Why can Aphelios Out-DPS every champion with Chakrams

Gets PTA stacked in less than second, than proceeds to burst you down. And it applies on hit-effects AND HIGH BURST WHEN STACKED WHICH IS EASY.

AND HE HAS A GLOBAL TARGET, POINT-CLICK ABILITY TO CHUNK YOU OF YOUR HEALTH THAT YOU CAN ONLY COUNTER BY STAYING OUT OF THE ABILITY RANGE (which is bigger than his range).

It's beyond absurd at this point.

Chakrams need to completely gutted and changed. His globals need to be addressed too.

Edit: For the global statement, i was talking about Calibrum which is excessively oppressing when he's ahead. Also, he can out-DPS melee champions with Crescendum (chakrams). His attack speed with them shouldn't influence travel speed. It should influence how fast they hit the target like everyone else or he needs to do significantly reduced damage after the first chakram is thrown. The attacks also shouldn't apply any on-hit effects. He's a range champion that can 1v1 Yasuo, bruisers, and even assassins if they can't burst him in one auto. His Infernum (flamethrower) procs on Runaan bolts as well which I also believe should be removed. The damage is too high and the width of the effect is too wide to proc on other chains of shots from Infernum. It feels like Vayne having her W proc with Runaans due to how high his damage is. Jinx's rockets are fair since they stop at the first targets hit and she doesn't have any strengths against melee champions.

Edit 2: I highly suggest you all read the comments. Good points about the game and outside of it have been raised. Let's keep this discussion going.