I want to update my terrible 60hz monitor because I'm tired of having good aim but seeing my enemies lag on the screen xD What factors should I look for? I don't want to spend too much but want a decent one

so i was just playing comp this evening. i had a good team and we played on icebox but in round ~5-7 (dont remember the exact round) 3 of the enemy players just went afk at the exact same time mid round. a few rounds later one of them came...