So what's the counter play to Sett?
Whenever I face this champion, like 80% of my games, I can't do anything in the laning phase. I have trouble farming, I can't trade because of the shield+true damage, I cannot even poke him because of the extreme health regen...So what do I do?
I cant farm, I can't trade and I can't poke. Is that a good champion design? And if I ban Sett, then I receive a Darius or Morde match-up which make me again instantly lose laning phase with nothing I can do.

apparently. But it won't be that way much longer.
actually shits on him. Q his W and GG.