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Patrick was targeted due to his father's abuse of him. Finally, Vecna targets Max for her trauma from witnessing Billy's death and uses Barb's (Shannon Purser) death as a way to use Nancy.
The Stranger Things script provided evidence for the theory that Max is alive inside Vecna in the sinister Upside Down dimension.
While restoring Eleven's powers in Stranger Things season 4, Brenner explains that Vecna/Henry does not just kill his victims, he absorbs them and takes on their characteristics. As a result, it appears that Max's consciousness has been absorbed by and resides within Vecna.
While intending to get his revenge on Eleven and Brenner, Vecna also goes after victims who have dealt with traumatizing experiences in the past (reminiscent of his childhood and his time at the Hawkins lab).
Vecna draws power from sad and angry memories and that is the main reason he targets traumatized teens. Those teens are a well of power just there to be absorbed. This is not just a theory, Vecna himself told Eleven about the power that angry and sad memories hold.
Vecna's obsession with time appears to be linked to his hatred of humanity. He views time as a human imposition on the natural world; an attempt to impose order on nature.
She breaks free, momentarily incapacitates Vecna, and runs with the determination to live toward her friends, dodging debris that Vecna throws in her path. Max hurls herself through the portal, awakes from the trance, and is held by Lucas (Caleb McLaughlin).
Vecna holds off Eleven long enough to brutally attack Max in his signature style—she levitates, her eyes go white and bleed, and he snaps her limbs. Eleven regains her strength and pushes Vecna off before he can complete the job, but the damage is already done.
Tragically, Vecna succeeds in killing Max, though she's shortly resurrected by Eleven (Millie Bobby Brown) — or is she? Vecna doesn't just kill, he consumes his victims, absorbing the essence of their minds and souls. Max, who lies in a coma, might have a pulse, but, as Eleven discovers, her mind is empty.
The fan-favorite character ended the season in a coma with her bones broken and eyes blinded at the hands of Vecna. Max technically died for one whole minute before Eleven revived her friend, but Eleven's powers weren't enough to bring Max fully back to life.
Realizing he had tremendous psychic power, he haunted his family with visions before ultimately killing most of them. His father was framed for the murders and locked away in a mental hospital as a disturbed serial killer. Henry then found himself in the care of Brenner, who decided he wanted more kids like the boy.
Is Max actually dead? Max attempts to hold on, telling Lucas that she's "not ready to die" but she succumbs to her injuries and ends up dying in Lucas's arms. Max's death allows Vecna to open the fourth gate, and rip a huge hole in the middle of Hawkins.
Turns out, he needs exactly four dead kids, like the four chimes of his signature clock, as they are his necessary sacrifices in order to open enough small gates in Hawkins, so that he can create that earth-shattering gate in the final episode.
In simple words, Vecna needs a total of four gates to take over Hawkins and rule it. Now, you must be thinking, why is Vecna killing people if he can take over the complete Hawkins? Well, in one of the previous episodes, it was revealed that with each person Vecna kills, he creates an opening to the real world.
So, Max was nearly murdered like Vecna's three previous victims. Just before Max died, Eleven rallied her strength, defeated Vecna and freed Max -- but the damage had already been done. Even though Max was free from Vecna, she died in Lucas' arms.
After serving as bait for Vecna, she becomes his “final sacrifice,” getting her bones broken and losing her vision during a low point.
Is Max alive at the end of Season 4? Physically, yes. Lucas tells his friends that Max is in a coma, and we see her wearing casts on her arms and legs. The Duffer brothers have also confirmed that at the end of Season 4, Max is alive yet "brain dead, blind, and all of her bones are broken."
One of the most confusing parts of season 4 of Stranger Things is Eleven being able to revive Max. As far as fans know, Eleven hasn't been able to do this before. It's not clear how she gained the power to revive someone or if she would be able to do it again in the future.
As Vecna, he uses these mental abilities as a way to psychologically weaken and lure in his victims – much in a way that Pennywise, Freddie Kruger, and Pinhead do. (All of which have been cited by show creators the Duffer brothers as inspirations for the villain.) But he does have a surprising weakness: music.
Stranger Things creators The Duffer Brothers explain why it was necessary for a certain character to be Vecna's fourth victim in season 4. Stranger Things creators The Duffer Brothers explain why Max had to be Vecna's fourth victim in season 4, volume 2.
Played by Jamie Campbell Bower, each prosthetic was glued to his skin with medical adhesive by prosthetics designer Barrie Gower and his team. For the finishing touch, Vecna was covered in "glossy slime to make him really, really glossy and wet looking," according to Gower.
This is because his trusted accomplice, Kas the Bloody-Handed, betrayed him and used the sword Vecna created himself to chop off his left hand and remove his left eye. This ultimately destroyed Vecna. Though they're clouded with cataracts, Vecna in Stranger Things has both of his eyes.
And he saw the possibility for escape when he realized the extent of Eleven's untapped potential. One manipulated Eleven into plotting her own escape, which also involved getting her to remove the device in his neck. (Henry, however, did not tell Eleven the truth when he said Brenner wanted her dead.