you have been playing the game for a long time, i get that but exactly how many tournaments/events have you participated in to base your experience on? because i've been in a lot of tourney (ever since i first started, fate egg tourney) and desync, like you said the first time, is caused by a lot of things
There are many ways desyncs can happen.
but then you downright pinpoint desync to and i quote "Certain players are involved in matches that desync constantly." which mean you basically accuse them to cause desync i.e. cheating
IF you have solid proof, this is not the way to present it
you're just shrouding your accusal in a discussion about fairness when the truth is, you're just upset because somebody desync while you got a good hand and ended with a bad hand and thus cost you the game (i'm pretty sure that is an example based on your own experience)
higurashi might've not meant it but i will say this, butthurt much?
keep participating in tourneys some more and you'll have more experience and come to terms with it (like everyone else have). desync = replay is the fairest deal we got now. sure its not fair if you started with a good hand but was dealt with a bad hand after a replay now and then but you cant blame it on desync, its all RNG
cheaters will cheat, that is true but they wont get away with it forever (if you use the proper channel to report them)
tl;dr version: desync is the BIGGEST problem in PvP, true but suck it up and re-play is the best way to deal with it for now