He's not trash tier, he's just VERY undertuned at the moment. It is impossible to collect enough chimes to reach 4 meeps (i.e. 95 chimes) in most games. Why? Because they spawn at a rate of 2 every 50 seconds (except 1:40 and 2:30, which spawn 1 each)... so 95 chimes takes 48 * 50 seconds = 40 minutes. That's assuming you don't miss a single chime in a pretty long game. Even with 95 chimes, you're missing half of the upgrades (which scale up to an almost literally unattainable 150 chimes).
His meeps need a toggle option, because you will almost never have them up in a teamfight if you helped your team take or defend an objective in the past 30 seconds.
I've played him in 4 normals so far (I wouldn't subject my team to him in ranked) and have gone 6.5-8 KDA in each game (heavy on assists, not kills). I can see why a lot of people might be bad with him, but if you play him smart, he doesn't have to be. You just have to know his limitations and build him a bit bulky. The mistakes I've mainly seen have been people building Luden's and other AP glass cannon items on him. DO NOT DO THIS.