Anyone who calls him "Stark Jr" or "Iron Boy".
What does that have to do with "Old School types"? And why do you even assume they "hated" the MCU Spidey "for some reason"? I liked Far From Home very much (though I was a bit disappointed with Homecoming), and I really like Holland, but "Stark Jr" and "Iron Boy", while being sassy, are accurate describtions of the dynamic that was going on. And by the way, nobody liked sassy nicknames better than Stan Lee.
There's nothing wrong with him eventually developing BEYOND that starting point. Hell, the comics made him be a successful scientist for a while.
Yes. For a while. He also was a teacher. For a while. And he had a living alien costume. For a while. They always return to the hero with the everyday problems, because that is what makes the character unique.
He tried to join the FF in his own FIRST ISSUE...
Emphasis on "tried".
…and joined the Avengers in the 80s for a while as well. Hack writers always contrived reasons for him to leave or not join but the MCU isn't afraid to go for that.
See, this is the point where you always get unreasonable. If creators (and fans) prefer other approaches than you, they become "hack writers" who are "afraid to go for that". You almost sound like a certain other infamous user around here. Just because writers (and editors, btw) choose a different direction than what you would have liked, that doesn't make them hacks, and fans who prefer those versions over your preferred one are not haters. They're just people with different tastes than you, and you better learn to accept that
It didn't become a problem until the writers in the 1980s and 1990s made the mutant hate really ridiculous.
You mean it wasn't a problem when the X-Men weren't popular?!
They're better at PR and have Government support.
If there's one thing we know, it's that government support doesn't automatically make something more popular with the people.
The X-Men suck at their mission, they historicallyalways have.
Because the X-Men get mad when they "interfere".
And now you're starting to sound like an X-Men hater. Maybe because they're not part of the MCU, yet?!
But, seriously, I've recently read "Secret War", and the way the Avengers, including Captain America, treated the X-Men was nothing short of horrible. Wolverine goes on a rant at one point that felt very well-deserved.
And apparently the old guard fans don't like it when he's not top dog even when he's NOT in his own movies.
You can be not interested, and yet tolerant of something. If people say they don't care about the Avengers movies, or Spidey being part of them, why do you immediately treat them like threats? I've seen this behaviour repeatedly from you, as soon as somebody suggests that the MCU is not the be-all-end-all of the superhero genre that every other superhero movie has to either be part of or emulate, you lose your shit and start these little tirades. Seriously, relax. Nobody's taking the MCU away from you. It may not have Spidey in it anymore, but it's still there, and if Sony continues with the established Holland-Spidey, you can easily pretend like he's still in the same universe, just not as involved with the other heroes as he used to. Everything is just fine, your favorite continues to be top dog in the genre, no need to bark at anybody who may have a different opinion.