Why do all the champs i enjoy playing have to suck :c

Why cant at least like 1 of em bee good, like, Kass got some buffs, he still dosent deal any damage compared to other assasins, Udyr is getting some MUCH NEEDED buff, and I think it might make him playable, nunu got some buffs, still the same garbage champ, Rio, yall just nerfed karthus, he fell out of meta, now nobody plays him, morde was reworked, op, nerfed and now hes useless, nasus just isn't strong because players bully me too hard for farming, ao shin is a high risk low reward champ, If you put someone who mastered yasuo or riven, vs ao (Stat wise) He'd get fucked, because he is just nowhere near as powerful. And Dingdong is just... A donger. Also btw riot, I know you've heard it before, but your genius aatrox rework... Was a little bit of a MASSIVE FAIL.
If anyone wants to give me some build options to make one of these fun champs useful, or suggest another not garbage champ that I might enjoy (ill say it right now, I don't like
and especially
)
Anyways this is a bit of a rant post, sorry for wasting your time, pls don't downvote, it hurts my feelings :c
My last games on these champs just tilted me a lot: Kassadin: 10/5/7 (I dealt 0 damage that game) Karthus: 12/7/14 (Felt like I was completely useless, even with 1000 ap and a voidstaff) Udyr: 12/3/15 (Went tank, did no damage, and wasn't nearly as tanky as other tank champs)

While you won't break any AP records, you hurt regardless of the enemies MR. You also do basically true damage to ADCs. Also, while he can see weak at times, he is a pretty strong pick in Korea, so odds are he won't be buffed for a bit.