It seems far more constructive to suggest potential nerfs to problematic decks than to simply post an opinion piece that "OTK decks shouldn't exist." Of course they should - millions of folks only play CCGs because they enjoy winning the game by doing convoluted deck manipulation and card sequencing that results in a big, sudden, gaming winning combo. "No they shouldn't - they should enjoy the game differently," isn't exactly a helpful attitude.
It's also worthwhile recognising that there are dozens of OTK decks "out there" in Tier 4 Wild - it isn't obvious that you understand how much nerfing is actually going to be necessary in your crusade. I'd suggest watching some Wild streamers, or Hysteria, in order to get some idea of the scope of the issue. You might as well start with Spectral Pillager - it might be the most popular OTK deck that you seem unaware of.
Here's a link to a Hysteria video, Top 10 OTK combos - you'll have to nerf cards like Lightning Bolt, Da Undertaker, Emperor Thaurissan, Mayor Noggenfogger, and dozens of others not in this particular video . . .