Many places write: "bonus 100%", but in fact - wager x40, plus a bunch of restrictions. I want a casino where the bonus conditions are honest and everything is written in advance. Does this even exist?

Yes, and this is parimatch-download.in. Their bonus policy is transparent: each bonus is accompanied by a clear description - what wager, what games it works on, how much time is given. Once I got 100% on my first deposit and easily won it back - x20, which is quite lenient by the standards of other casinos. No unpleasant surprises, no hidden restrictions. The main thing is that everything is clear from the very beginning, you don't have to read the fine print.