Mordekaiser and counterplay.
Yea I get it he's a juggernaught don't get near him and you'll be fine. BUTTTT when he has a dragon that applies on hit effects ehem rylais for example. It makes defending a tower pretty much impossible. There really isnt any interesting way to try and outplay him because once he gets ahead he just spams shield indefinitely and can't be killed. This gameplay pattern reminds me exactly of old mordekaiser and is really nonsensical to play against. It's not fun it doesnt feel rewarding to kill him because you're forced to kill him otherwise he'll clean house from that sustain. When he has that dragon up you're pretty much being forced not to fight you have all your decisions taken away from you simply because morde is there with an ice breathing dragon. If you go in you'll die. If you don't do anything he'll just bullshitt his way through all the damage thrown at him with a gunblade. It's bogus and clearly an unhealthy case of sustain abuse.
Please tone down some element of his kit i would say taking away on hit effects from drag would at least make him bearable. His pet shouldnt have access to his item inventory and neither should annies tibbers or yoricks ghouls. It's total bullshitt and makes the gameplay much easier on those champs then need be.
feels about his kit and counter play
and make his life heal and make him nonexistent in the game