America didn't fuck over Europe; there were a ton of very diverse style of comics all across Europe. I remember in the 90s in the UK you had sports comics (especially football), comics for girls, a fair number mixed mostly comedy with a few serious stories, now and then, action comics, war comics, sci-fi/fantasy comics etc. Almost all were anthologies, with a few outliers like Commando who published four comics a month.
What happened is that people just stopped buying weekly comics for the most part and the publisher's funding dried up so that they had to end a ton of the running titles. There were half a dozen children's anthology comics when I was young; now there's really just one. There were a number of war comics; now just one. Fantasy/sci-fi, there were a few, now just one. And football/girls comics have fallen away completely.
How people bought and consumed comics changed and the enthusiast market became king; this was against how the British comic industry was set up for the most part with really only 2000AD and Commando managing to pull through on shop shelves. 2000AD mostly due to a dedicated fanbase and Commando due to a cheap production cost and nostalgia.