Any tutorials on how to beat the tryhards?

I've been playing for 3 weeks, I have experience with shooters (former counter strike competitive player) so I almost reached legendary before the season reset and it wasn't difficult at all (the only difficult part was adapting to the 4 finger HUD which I never used before as I'm a computer gamer).

The only problem that I'm having is sometimes I get matched with "tryhards" who hit me through walls and use glitches like hiding behind a non-wallbangable window where no matter how hard you try you can't hit them, and when you try to surround them there's a tripmine or teammates with annoying operator skills who won't allow me to sneak on the guy doing the glitch (or whatever it's called). It's not like in counter strike that you just rushed with good aim and movement and you could headshot them fairly easy when they shot through windows.

Are there tutorials or gameplays out there that you can suggest to learn how to counter these things? I'm having a hard time trying to beat these people.