I have usually ~50ms in games.
On this game, there are situations (for unknown reasons) where I have like 4 seconds "desync".
Yea it's not latency, there is basically a desync between me and the server, it can't be latency because on Demon wall, I have to position myself ON the spell to evade to actually evade it, because of this "lag".

I don't know what's causing it but it's definitely increased difficulty ONLY FOR SOME PEOPLE. So, can you really keep saying that's it's an issue that players should solve and not devs? I feel something is wrong in your mind, if you think this.