It means that you are extremely inconsistent and probably reached your peak.
Your cs numbers are horrible. From what I see, you only manage an average of 6cs/min, which means that in 30 minutes, you only have 180 cs, when you should at least have 250. That's one mistake you CONSTANTLY do and don't seem to want to try and improve on. You also play quite a lot of champions, which you probably don't know well, thus having this inconsistency in your performance.
I assume you also do other mistakes that players in your elo typically do. You die quite a lot of times. Your main champion, Illaoi, has a KDA of 5.5/6.8/5.2 over 182 games with a 51% winrate. So you basically won 92 games and lost 90 and your KDA and cs numbers are horrible.
You definitely need to improve on csing, mechanics and not die as much. From your damage dealt compared with your KDAs, I can see that you also try to constantly fight your enemies, even when you are in a disadvantage, having no vision, or just not being competent enough with your champion to deal with the fighting scenario.
And then, there are other games where you hard stomp, but you didn't quite do a lot of damage, which means you didn't really do that much to actually stomp.
The times where you perform well are actually quite rare. I only saw 2 games where you had decent KDA and cs and damage done, out of the 30 first solo/duo games I saw. That means that you probably don't deserve to be any higher than what you are.