take it as you wish since i litteraly signed up to make this post but i was just aboot to suggest lowering the player slots(somone ingame told me to) for that exact reason, joined right now with 60ish players was 63 when i looked getting 16fps at the main AO drop the view distance to 1200m and its still at 16fps ( i know ryzen fails for arma cos low ghz but this was classic overloaded server)
that is all i came to say , thank you for your time and server