Kindred is fine.
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i liked the way she could stay longer in lane because of her heal
I found this actually had little impact on their actual performance, since you can just build lifesteal and even without the heal I think they can farm the jungle pretty well. I don't recommend taking them into a lane, because they tend to perform best in the jungle and, it can potentially be much more difficult getting a passive stack.
and the way she could spam her Q.
I know that felt weird, but I think it was better in the end because skillshot based and immobile champions have better counterplay against them. And their Q does have a low enough cooldown so dodge skillshots, plus it deals damage based on how many stacks you have. And it hops over short walls too.
Now she is just boring to play, not fun at all...
That's subjective. I still find them fun and rewarding to play.
she is just too squishee and in mid game its hard too keep up because u need too many stacks to get decent dmg.
Funnily enough, usually I do best during the midgame. As long as you didn't mess up or netter yet, did well in the early game you should be fine. If anything getting stacks should allow you to shred squishies and even tanks. Also to get as many stacks as possible, you should play smart and plan ahead.
I think riot have been nerfing her too hard this season. Plz buff Kindred
I think they're still strong this season. Not exactly top tier but still strong if you practice enough. They make a great niche pick, without being consistently banned or overpowered.