Severe lag/desync issues. Gun not firing, etc

For me, this build is unplayable.
When I queue and join a match, usually I cannot fire my weapon. I can hear the other player moving around, and then I get killed. Occasionally the game will get close to being in sync and I’ll be able to shoot, but the target hasn’t actually been there for quite a while so hitting them is out of the question.

Framerates are happy and stable. My connection is too, as far as I can tell.

Please advise on any further information I can provide to iron this out.

Very interested in the game I’m seeing others get to play in the lobby!

Do you get an audible “click” when the gun doesn’t fire or it just doesn’t fire?