No addons, no sourcemod - and yet the game never fails to NOT load whenever I try to.

For comparison, Yama - I'm pretty sure everyone of you know that - loads effortlessly, and it's as detailed as Chernobyl. Yet the latter doesn't budge. Is it because of the TLS update? I noticed the campaign hasn't been updated for two years now despite the endless complaints of its borderline unplayability.

Shame honestly. I really wanted to play this certain campaign (it was one of the "best rated" campaigns out there).