These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Logan escaping the White House with the Iron Man suit.
The rampage against the Hulk Gang.
And on the villains' side we have Mysterio, a villain who was mostly considered harmless if he wasn't backed by a team, being responsible for the death of all the X-Men and for completely breaking Wolverine for 50 years. Horrifying, yes, but also a very big accomplishment for a "harmless" villain.
The Venom symbiote merged with a Tyrannosaurs. Nothing else needs to be said.
Banner "Who else was I gonna mate with besides my first cousin? Jenny She Hulk was the only woman out there who could take the damn pace!"
In the backstory we have Mysterio tricking Wolverine into slaughtering the other X-Men than dropping the illusion just in time for Logan to see and hear Jubilee, the X-Men he's always been closest to, gasping out her final words. Damn.