If Irrelia has a 45% winrate, does that mean she needs to be buffed?

I play against this champion fairly often and this champ seems ridiculous as fuck. She deal loads of dmg, low cooldowns, and a shit ton of dashes, and alot of movement impairment and quite tanky, I barely know what is actually going on. Irrelia players seem to kill the enemy top laner regardless of being behind kills or cs and she can take on multiple people at once regardless of being behind. So I looked at the win rate for this champion and saw that it is 45%. According to the logic of some people they say that a champion below and above 50% need a buff or a nerf. So does this mean irrelia needs a buff? This champion seems broken asf and I don't think it is right to buff her at all...
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