Fiora hasn't had many changes in the past few patches,so why is it, that just now

the indirect buff's she got with the death dance change, the new ga, and the increase on ad for all lifesteal, helped her massively since it keeps her more sustained and made her deal even more true damage, adding to this her only hard counter ( panth kinda is but if she predicts properly she can turn that against him kennen doesn't give that option) is getting nerfed next patch as well, so keeping fiora from going completely out of control is a good idea

Well mostly because there was way more cancer to complain about: Ivern, graves, lulu, caitlyn, leblanc, ahri. Before that lethality champs running rampage. She's been sleeper op for months just right now after most of the shit got nerfed people noticed her. I permaban her in my games since 3 months already. Also new GA and DD fit her quite well i think tho i can't give any insight on her itemization rn since as i said she is banned in most of my matches regardless of my role.

Strawman

She's been OP in high elo for quite a while

It's the cycle of league

Why is it that people keep asking these kind of dumb questions regarding champs only now getting complaints like the only reason it could be is that they're the flavor of the month? Remember how nobody figured out how cancer was botlane before nerfs way back when? All it took was for a few people to pick up the idea for it to spread around and become popular enough for people to realize it's a problem. That's the very definition on what sleeper OP is. The same thing happened with tank Ekko. Ekko was problematic on his own, but it took everyone picking up Tank to show the community how much of a problem he could be with a specific build. Whether it be a champion becoming significantly stronger from a simple lane swap, a different build choice, or just a strong champion rarely getting play; people will only be able to point out the issue AFTER it's brought to light. Pre-Rework tristana was pretty stupid but nobody knew she could be really busted until someone brought her to the LCS, causing a bulk of the community to make her a very commonly played champion. There are clearly some instances where people complain just because a champion is being used too much, despite their being no balance issue with them...but you can't always treat it as if every other instance is the same because of the out-liars.

I've been spamming Galio ever since his release and have had great success with him. So why is it now, that everyone is playing him and complaining about him? Welcome to the real world, where people don't realise how broken something might be to abuse it, let alone start complaining about it right off the bat.