The key to solving power creep

Power creep in terms of league of legends is the concept that new champions are always stronger than old ones.

If you'd bother to look at data, every champion in the top 10 winrates in diamond+ are several years old.

Out of the most 5 champions released last year, sylas and yuumi are often considered two of the worst champs in the game. Aphelios and qiyana hover from 46-48% winrate from iron-diamond elo(which is literally more than 99% of the player base) and Senna is the only one with a good performance rating.

How is this power creep?

An obvious solution, that they refuse to implement.

They used to do that, people complained.

Thanks for showing your complete lack of common sense. Yes playing a bunch of gimped champions sure is going to be fun. Some champions need buffs, whether you care to admit it or not is completely irrelevant. There are champions that aren't doing what they are supposed to be doing. Why the hell should we nerf 50 champions for those at the bottom to feel "ok"? Instead of you know... nerfing the overly strong ones and buffing the weak ones. If you buff the weak ones and nerf the strong ones you don't need to make such massive nerfs/buffs that completely destroy the feel of the champion. But nah, just need everything because that is the smart thing to do. It's better if everything feels like a minion instead of feeling like champions.

Except...That doesn't realistically work

When a champion is weaker than the rest of the roster, even the balanced champions, it's significantly more work to nerf every champion stronger than them than it is to buff that one champion.

Yeah, nerfing strong champions will buff weak ones, but not significantly, especially if the champions at the top aren't a counter to that champion.

"Power creep" only applies when past things are static or largely static, like in Magic, or even Pokemon (specifically the video games, but also applicable to the trading card game), either because of design decisions (e.g. no pokemon base stats changing between generations, barring situations like the special split), or because it's literally impossible (when the game is in print on numerous small things like cards, it's pretty hard to actually run a patch since you'd have to change every instance of that card, and if it's a nerf people simply wouldn't do it).

Since everything in League can be patched and changed to balance it with the rest (and Riot's actually willing to change those other things, unlike other companies that don't despite the fact the ability exists), power creep is more or less an impossibility.