I only saw the first Dr. Strange movie. Haven't seen any other movies he's in or read the comics. So I can't comment on that specific Marvel character.

As for Broken Matt, I'm kinda making a joke, but I think there are parallels:

• Absurdism thematically/aesthetically.
• Matt can tap into other versions of people, as seen in the clip above. This is similar to Evelyn's ability in the film or what alphaverse people do etc.
• Following off of the above, Matt refers to body's merely as "vessels" which hold a spirit. This is arguably how body's are treated in EEAAO.
• Matt is broken. His mind has been shattered by the mystical knowledge he's acquired causing him to act in strange ways and giving him his powers. This is similar to Joy who was broken through transcendental knowledge to become Jobu Tapaki. Just as she tries to break Evelyn in the film to make Evelyn the same as her, Matt tries to break his brother, Jeff Hardy. Unlike Jobu Tapaki, Matt succeeds reforging Jeff as Brother Nero.
• Theme around family. Matt's feud with Jeff in the first arc of the Broken Saga focuses around their strained family dynamic. After Matt breaks Jeff, one focus of the new arc is around the weird family Matt Hardy has around him at the Hardy compound.
• The Hardy Compound fills a similar role to the laundromat. This is where Matt confronts Jeff in the final deletion, where they have their biggest confrontation with Decay and where Matt and Jeff make amends. Similarly the laundromat is where Evelyn and Joy first come into conflict during the film, where the final showdown with the IRS occurs, and where Evelyn and Joy come to ultimate amends.

Maybe I'll write more at some point fleshing these ideas out.