In League of Legends, Dota 2, Valorant, and CS2, how often does a pro team get upset by an unknown or lesser team? Or a brand new team that most people haven't even heard of?

Is Sagats DR that good? Is it top 5 worthy?

>amazing normals, damage, corner carry, drive rush, and burn out pressure
>no dr fb, cr.mk dr, or meterless throw loops
So hes probably going to be mid tier or a little higher?

I haven't played seriously in a long while and don't want to play my old character. For what its worth at my best I wasn't much worse than my 1400-1600 MR friends. If I wanted the easiest ride to be a 1700-1800 player who should I play? Also I have a lot of free time