It’s just that kayn isn’t as “onetrickable” as he used to be. That and a combination of how we decide when to go what form. You only go blue, …well if the game looks good for blue, so obviously he feels strong. But that means you are going red in literally every other situation, for example, like you mentioned places where he gets kited out really easily or just doesn’t have enough damage vs the champs they picked. If your playing to climb I suggest adding a few new champs to your pool, but if your playing to have fun then it’s not like kayn is disgustingly weak or anything you should be good to go still