What happened to Tahm Kench?

Don't worry. We Kenchers are still around in force.

He was nerfed a bit, plus people figured out to to play against him finally instead of just endlessly complaining. This caused the FoTM people to stop playing him, which is the largest playerbase for any champion

He is weak now, the attack range nerf was probably the biggest hit.

getting nerfed 3 patches in a row combined with nerfs to some of the items you typically build on him, really hurt him. don't worry though, the real tahm mains will still wreck almost every top laner