Hiya!
Fair enough. It looked like they were going for something with more nuance, etc. In the end though, if it's just going to be "comic book logic" where things like getting help aren't even mentioned...ok. I had started hoping differently, but, fine.
It sucks, because it's a big issue in the real world, and I guess I just wish writers handled it more responsibly. Sure, we've seen Stark have panic attacks, but not one mention of how it's not longer an issue. In the meantime, as someone posted up above, Avengers movies are about dealing with his unaddressed issues.
But therein lies the rub. You are placing your own expectation of what "mental health issues and help" entail. I don't know your background, however. Sorry if this sounds condescending or obvious, I don't mean it too!
Different people handle stuff differently, 'natch. For example, I was suicidal in my youth (16/17 years old. I attempted twice. First time I woke up in the hospital although I do vaguely remember a couple points leading up to it before passing out due to blood loss. Anyway, two shrinks later and some drugs for a year... didn't help much. Attempted again; woke up where I attempted, got to school, got help, hospital again. Shrink for a few months, and drugs. Didn't do much. But, I managed to figure some stuff out on my own after reading the Satanic bible (yes, I'm a Satanist, have been ever since). I'm sure the shrink helped a bit, but only insofar as he made me realize... "naaa... this isn't going to do it for me...gotta figure stuff out on my own". So I just decided "Ok. I'm done with the suicide thing". Problem solved.
I had minor Claustrophobia as a kid. Up until about 14? I think? Then I just kinda started 'ignoring it'. So, now I can go into elevators without hyperventilating and panicking; although it was never 'severe', it was... annoying and embarrassing. I KNEW it was irrational and so just learned to compartmentalize the feelings and look at them from an "outside view". To understand what my body was doing and why. Although, to be honest, wearing a mask with the hole Covid thing is causing... "issues"; so I do remove it and take a couple of deep breaths every now and then when I have to wear one (in a store, etc; oh, I'm in Canada). Makes me feel better. Again, problem solved.
Triskaidekaphobia. Had this from about 13 (lol!) up until 4 years ago when my wife died. After seeing her dead in the hospital bed I walked outside to go home. Saw a license plate that totaled 13. Thought "F you!" (always saw 13 as some 'malevolent force', so to say, even though I knew it was all in my head). Then got into the car and saw the time; again, "13". "Ok. Fine. You win". Ever since then, no problem with 13. See it, say it, write it, count it, buy 13 things, pay $13, sit in the 13th seat from the left...like water off a ducks back. Problem solved.
So, yeah. Sometimes all it takes is for the person to just talk to themselves, think about what's going on in their brain, and then just decide "Naaa. I'm done". Now, as we ARE talking about super heroes here in a completely fictional world... I have zero problem with Tony Stark having some PTSD for a while and then "getting over it". He talked to himself, Jarvis, and presumably Pepper....I'd also say he bounced things off of Bruce. He figured it out and, "problem solved".
Just saying... people are complicated and sometimes a person is fully capable of just 'fixing themselves' with the wave of a hand or two. They don't always need years of therapy and thousands of dollars in drugs and whatnot.
^_^
Paul L. Ming