@Eshshshss
I identify myself as a "Diamond4+" player because I CAN get out of Diamond 4 by myself but I dont see myself as a master player because the one split that I got to master I:
1) only played with the same two premades, both of them a bit better then me when it comes to fighting, not night and day better but still considerably better, With that being said, I think I had the best "game sense" of us three, like I was usually the one who knew where enemies where, based on previous fights we had heard, the new circle location and areas we just been to and cleared etc. But still, I know that I would never had got out of Diamond without them.
2) We really had to play tactically, like always looking for cheezy third parties where we tried to swoop in right after the fight was over or sometimes just get one or two knockdowns from far away and then change position/rotation and hope they would finish each other, giving us Kill points.
4) Because it took us pretty much the entire split to do this.
5) Simply because I know that I am more likely to lose vs a current Master or Pred. I will still usually do said "75%" dmg to them and I will ofc also sometimes win fair and square. But my overall experience is that I am just below the average Master player, skill wise.
But honestly, what you are describing is exactly what I experience but maybe just one or two ranks above your such rank... If what you described in 1), 2) and 3) start to happen to you in Diamond 4, then same things started to happen for me at maybe Diamond 3 or 2 (thats why I needed my premades and cheezy tactics to progress). And some other player, who is worse than both of us, maybe experience this in Plat2 etc etc. I still dont ubuy why this would be a proof of cheaters. Everyone has his individual "peak rank" where his individual skill isnt enough to progress further and need other variables in their favor to progress, like my premades for instance.
And btw, You mentioned that you get one clipped by L-star alot.. Its actually OP even after the nerf. I have not played with L-star much at all until this season but I can still manage to control in decent enough to one clip also on longer range. Here is a clip with the L-star on approx 30 meters with no attachments except mag. Its max dmg is 468 not counting HS so you only need to land less than 50% of the shots to one clip a red armor so imagine how OP it is in the hands of a Predator or just someone who practiced with it alot..