Anybody able to tell me why I see Darius and Illaoi banned so much?
It doesn't make a lot of sense to me, especially in ranked. It is way easier playing vs a Darius or Illaoi than any other champion with mobility, tankiness, and similar damage(Ekko and Yasuo are the biggest offenders).
Yasuo and Ekko are better than them with having similar damage(still weaker), able to stick with enemies hardcore, have few risks to go tanky, and offer more utility to the team(Yasuo CC and windwall, Ekko with 1000000 slows and a stun.)

champions that Darius can actually gasp outplay as opposed to them "making mistakes" and him punishing.
pretty core?
because they can be oppressive in lane. I don't really have issues with them and almost never ban them. Lower Elo players feel that they are too strong, but lower Elo player have no idea how to lane or how to farm under tower.
and I will ban champions that alter the dynamics of a game such as
and
.