Kha'Zix
So I used to play Kha'Zix a lot before his rework, and after that I didn't ever really play him. Decided to pick him up to try it again and... well, you're welcome to look at my match history.
Is he just completely unviable anymore? I couldn't find an opening to get a good gank in, felt like I needed the damage early so I evolved Q first but without the evolved E I couldn't get into or out of a fight. I was getting blown to smithereens like I was nothing. It doesn't help that the enemy Yi got INSANELY fed (which is what happens when you don't ban Yi in low elos but that's a completely different rant.)
I couldn't gank. I couldn't farm quick enough. I couldn't do anything but jump in and die. Was I just against the wrong people? Should I not have evolved Q first? Or is Kha just not worth playing at this point because I was constantly hovering between 40 and 60% health which made it just stupidly unsafe to gank.