Riot, have you ever try to play Olaf against Ahri or Kalista ? Try and tell me if you have fun

This applies to any immobile champion, not just Olaf.

No no no. The problem is that people like Ahri and Kalista can poke without losing anything. Minions stupidly only attack if you auto a champion, not if you use abilities. So champions like Ahri and Morgana can freely let loose hell on you without any retaliation. That is the only reason why poke is broken. Minions need larger radii to react and they need to react upon spellcasts.

Riot's balance team doesn't play melee champions. Even their top laners are all filthy ranged abusers. (I'm not making that up. Last time I checked they had like 1 high elo top laner on the balance team and he spammed gnar and mages all day.)

Kalista is a massively toxic champ and should be deleted. If you can not stun or pull her you cant catch her and she can easily kite you around. Since she jumps instead of runs slows are worthless on her, she has a better ability than twitch for damage and if for some god awful reason you are getting close to killing her... BOOM her ult pulls in amumu or Rammus or Leona... some equally tanky champ that knocks you up and keeps you away from her as she murders your entire team. Ever seen a match with Galio Fiddle Kalista Lulu? galio gets massive ults with kal then uses his as fid ults in ... they just deleted your team. If for some reason you got lucky with a flash or something and are thinking about getting away here comes kalista hopping faster than you can run with max movement speed.

Olaf is played quite a lot recently actually