From my experience, it’s often the high level players and those who are part of clans who tend to adopt defensive stance while attacking…
I think that showing k/d at the end of the round might have an influence on how people play. Either hide it or also show player participation on objectives (bombs armed/defused, escort time, objectives delivered, time spent carrying objective…)
Another thing I noticed is that stacking is certain to happen whenever there’s a twitch caster in the server…