I have been having this problem for months now. From the very first day i bought the game.
Out of 50 attempts to join there might be 1 or less times that i won't be kicked. It happens shortly after I enter the game, everything seems fine, looking around and after 2-3 minutes i get kicked.
I have previously posted a ticket but no one could really help me. I have searched all other tickets having the same issue and non of them seem to have managed to find a fix.
This has become to be honest quite frustrating, I have like 30 hours in steam (of pure frustration) unfortunately and it has been some months since i bought it so a refund is not possible. I don't know if the developers know about this but I really hope it reaches them.
Another ticket that I have joined in which you will find the things I tried and things other members suggested: https://feedback.bistudio.com/T120817#1561958
my own old ticket: https://feedback.bistudio.com/T122832
My PC:
Gtx 960 4gb vram
processor AMD phenom II x6 1100T
4gb ram