Ad health champs that are usually half tank/half ad but only build ad now

This meta really doesn't work for ap assassins to well except kat. and or just other ap champs in general. I just got out of a game against a wukong. He built health damage, i built to counter it as ekko. but after he had dirk one q he could just do 200 damage to me. Where if i wanted to do that i would need to q and e getting my passive off. but id be out of abilities since they are on cooldown so i wont do any good damage. then he just autos me since he is ad it does a lot. and im dead. On top of that he built very little mr and lots of health. But even building to counter that i couldnt do damage to him because the amount of health he had.

Im just saying it seems a bit unfair for champs like ekko and heimer (my two mains). I cant get off any good damage till my second full item which by that time is to late.

Just wanting to know peoples opinions