I meant also exclusion for scanning ( Settings > Update & Security > Windows Security > Virus & threat protection > Virus & threat protection settings > Manage settings > Exclusions ).
I asked about VPN because the idea is about “network relevant issue”. Internet “speed” is not what I have in mind, more a connection lost thing. But as said : a guess which may be completely wrong in your case.
Have no other idea for the moment as to “play a bit” with the game settings… disable some multiplayer features, etc…
There are other issues with these ucrt…dll ( e.g. sound driver ), but I assume its not relevant for you.