Because the EU as a whole is quite happy to censor and generally wield the same tricks as "non-Western" countries in their desires to combat misinformation (however our EU bureaucrats define it), child abuse materials (see Chat Control that thing is not going to go away), and hatred (oh boy).
We've never guaranteed the right to free speech and because we haven't it's a slippery slope all the way back down to the furnaces of autocracy we sprang from.
The Spanish president has come out on record saying we don't deserve anonymity on the internet.
Not sure why you get downvoted. EU censors quite a bit. I can't read about 10 Telegram channels that I could access just 3 years ago, and the list is growing. All due to "vioalted laws of [my country]". (said near-east related channels have nothing to do with my country, government just doesn't want me to read them)
Some people deemed "russian assets" are not just censored, but stripped of ability to leave EU and prevented from being able to live in EU at the same time by financial sanctions, etc. Of course this doesn't happen to actual politicians in power, for whatever reason those never get sanctioned by EC, despite doing more "damage" than random blabberheads on twitter.
It's a mess.