Bad player

Guys am I just bad? I play abyss and I'm at AA2 but I just keep fluctuating between topaz and sapphire. One day I'll be at like 75-80% winrate in sapphire and things are looking good, but then I'm just back to topaz and even there I keep losing games. Then next day I'm back to sapphire with decent winrate.

I fear I may be dog poop.