I have a website with some adsense ads (that pay for the server).

I try blocking the most obvious scams by blocking the announcers but it's basically impossible because the same dodgy ones keep coming back with a new name.

Also hard because they're not always in a language you understand.

I don't think I should do all this work instead of the biggest ad company in the world just to earn 5€ per day, but I'm also not aware of any better alternative.

Have you tried reaching out to companies offering relevant products? Sometimes they have referral plans and don't require the same level of tracking.