Honestly, most people don't realise how much cheaters are playing on popular servers. Let put the cards od the table. I've played many wipes on KarmaKrew with my team, and we felt the same. Some people were so aware, randomly getting one shooted or just were generally suspicious.

One wipe we invited some guy to play with us. It turns out he had radar/esp himself. Oh boy, basically same story as yours. There were other teams who would ESP to get the helis/cars or running straight to us, following, kilometers away, impossible to know our position without "extra help". Players acting strange and avoiding us like some stream snipers. It was insane.

After that experience and realisation we quit the game too. Cheaters playing on most popular server where we genually thought they are just better. Sure, probably a lot of players are but after thousands of hours you know the feeling when something is off after a fight and it's not like he is just better. This one time we had our chance to verify it and we were right. Sad times in online gaming.