How is it that at 60fps,streams often look better than my monitors gameplay(240hz) Even without video processing tools,is there a way to get close to that effect?

I’m only a bronze so I know my opinion isn’t that valuable, but I just got a new pc and my frames went from an inconsistent 60 with my game freezing a lot, to around 150 on high settings. And I feel like I play much better, I play with silv...