Kayn needs work

I can't count how many times I've used my ult and still died. I ulted an Iloai who had ulted, and she killed me with her ult while I was in her. WTf is that. I'm supposed to be untargetable. Foret that Illaoi was doing 1/3 hp with each hit and I was doing 1/100 of her hp with each hit even though we had the same items and levels and kills.

• His kit needs bug fixes
• His damage needs buffs
• Hit ult should remove all effects and make him unkillable

There is a more to it and I'm not giving numbers, but he feels bad to play when Im I die in my ult to something that shouldn't hit me.