He's melee. And I don't mean melee in the sense of Irelia, Sylas, or Akali being melee. You can bully him all you want, so long as you dodge his super delayed dash.
All his strong points have detriments. His taunt slows him despite him already having low mov speed, his knockup requires someone to get hit by his dash, his ulty has a delay and incredibly high CD, you'll never get hit by his passive unless he's atop of you, and his Q is also easy to dodge. There's just a lot a counterplay packed into him. His numbers are high to compensate for that unreliability.
Other champions who are also compensated for this unreliability would be Illaoi, Mordekaiser, and Lux. The trend with these champions is that they can do major damage if they ever catch or snare you, but are pretty useless if they don't. If you check out their stats, you'll notice that they only worsen the higher the elo. That's because most of everyone have little issue with sidestepping their actions.