>>281493064
Aggressively pushing, not using cover, having a predictable stance (lots of the "omg they're really good" high tier players just hold a oneshot headshot gun at head level and tap) playing without your team, not communicating, not using grenades/using them improperly, ect
Just basically every bad play under the sun all contributes to your overall tard level, generally just follow someone who knows what they're doing and back them up, bonus points for staying in a spot that would allow enemies to see your buddy before you so you can use them for advance warning