Fun fact: the parties that want this are actually those who criticise the EU the most

Yes well, they're running out of good arguments to show how bad the EU is, so they have to force some bad decisions through so that they may have something to cry about.

God I love politics

Not true. In the UK, the only party that would repeal the heinous “Online Safety Act” are Reform UK, which is headed by notorious Euroskeptic MP Nigel Farage.

"would"

The party that wants this the most is EPP - you can't be more pro-EU than that.

Not really. Looking at Polish MPs for example, there's no clear pattern, rather a "healthy" mix from all parties with some random selection of opposing ones.