after i play with config, i can say - learn how to aim.
but actually my ping is 50-60, so, maybe i'm wrong. sometimes i got high lag on a some servers (teleporting, time traveling, weapons stop shooting), but it is not related with hit-reg, i mean, all players got this lags. but most of time everything working gine for me.
don't forget that the weapons trail not exactly the same than your weapon "real bullet" (i mean, bullet is just a point, and bullet trail is only animation which can fly in absolutely wrong direction, and don't fly immideately, which is not affected on hitscan bullet), so your crosshair should be exactly on enemy hitbox in a moment when you shoot, or damage nothing happen, even if you see that you "bullet trail" fly into enemy body.
probably, it is all about high ping, and ping difference between 2 players. imo.
i play a little on Vytro, it is always shooting good, except miss by my pilot mistakes. yesterday i play on AR/SMC assult - feel pretty good too for me.
more annoying things, that sometimes i can blow tow rockets in my hand, this is sad.