The problem is that Rito doesn't know how to balance giving buffs to champs when they don't need it, nerfs when they're already the weakest (Kindred), or buffing when they needed nerfs.
Seasonal changes/tweaks are more of a way to manipulate players into not being bored. Like here your favorite champ changed now you have to get used to its new abilities it's almost like a new champ :D
They probably go like "you may thank us for the new content"
Other examples like the questionable movement speed all the champs have
https://leagueoflegends.fandom.com/wiki/Movement_speed
Like really... how are people with heavy armor faster than some without? Or "heavy build" faster than obviously Olympic runners. I "challenge" anyone to outrun a goat (Kindred) while wearing some of the armor these people have.
Which I pointed it out here by comparing Garen heavy armor with Kindred's having only body weight as it seems the bow might be magical. You think Garen is faster than Kindred when she's got those legs?
https://boards.na.leagueoflegends.com/en/c/gameplay-balance/673ttjXb-kindred-is-the-only-one-who-needs-a-buff?comment=00010000
What I mentioned there is this...
The broken/op aspect of champs doing one shots or whatever comes from the fact that they probably worship Shia Lebeouf. They believe this idea that dealing the most damage as fast as possible gives (an illusion of) fast paced action.
https://na.leagueoflegends.com/en/game-info/get-started/what-is-lol
"League of Legends is a fast-paced, competitive online game that blends the speed and intensity" enough said drops mic
A clear example of this is Rengar one shoting people. It's actually two shots but it's so fast that it looks like one.
There are other examples like CC vs tenacity, like for the most part it's hard to reach 50% tenacity. Runes and mercury boots should give 60% tenacity, but get both and tell me the value it actually gives you. I'll tell you 48%, then there's the unflinching keystones giving 20% when summoner spells are on cooldown. The total should be 80% instead it's around 52%. What about CC? well for starters 50% slow is way too much so imagine slows up to 99%. Well then that must mean durations are short and that 99% would only last 1s tops... Nope its one of the longest at 5s. As for duration the longest I've been stunlocked has been 10s without being able to do anything.