Ercole, you definitely need to stop making strange accusations without any proofs. You are literally insulting every top 50 player in Global QM leaderboards. All this people are “cheating” by winning most of their games, how dare they?!
You mentioned how hard it can be to reach high rating. Well, reaching 1000 points rating in any particular template is a decent achievement indeed. Can't say the same for 1000 in Global and not sure if you can fairly judge those who are high above this level. It doesn't matter if we are speaking about René with many thousands of games (try looking second place in global
https://www.warzone.com/Profile?p=7117253396, but be careful, don't get a heart attack for such outrageous “cheating”) or Ozijs with much fewer ones — both ways need highest skill to maintain incredibly high win rate. 91 or higher, as Alexclusive mentioned here. If you think that it is impossible, then I wonder what could you possibly say about perfect 1vs1 ladder runs and people who keep setting new records there. Damned cheaters, aren't they?