People complain about balance changes, but there's another, worse form of bad management going on.
Balance is honestly a trickier thing that most people realize, especially when it comes to pro play. Because when we talk about pro play, we talk about people that understand mechanics and strategies on a deeper level than the average player, and being in a pro match is different than an average match because all players understand that. An average player may, for example, think ADCs die too easily, because they lack an understanding of proper positioning and get caught out alone, when pro players all know this, things change from a single persons champion and playstyle, to a champs place and the players collective work to keep their ADC safe. In pro play, where players are able to create detailed strategies for separate moments beyond basics like "baron at 37" or "remember to focus squishies", where as in pro play thing get more detailed, even if it is not communicated, like how one may perhaps reason, "with Amumu in their comp, we have to stay somewhat split up so not all of us get caught in R, but he probably knows I'm aware of that, so he's going to use it later in the fight, but where and how is he going to try to catch us with it, and what will he have to use when he does, and what will my teammates also do about it?" Trying to balance so that a champs tools can be equally powerful to players with someone more like a basic player, and the advanced player at the same time is a task that people seems to want but have no say on how it would be possible. How exactly is this even supposed to work? Would it even be a good idea, being that because we don't know what this kind of balance would entail, that we might take good things out with the bad? People claim that one thing or another is overpowered, sometimes don't even specify whether they think that a champ is just totally OP or only in some levels of play, and yet further, do not explain why they think they are OP, is it because a person doesn't know what do do against them, or is it that there really is no way to reliably stop them from winning? What is their level of understanding of the game? Not everyone can get to high levels of play, either because of incapability, or because it just isn't what they want to do with their time, as casual play is good enough. So they can't be expected to either get out or reach high level play, if everything is high level play, then everyone is just at a sort of middle level. So we have to figure out what compromise can be made, or how we should think about balance, accepting if it ends up with a negative consequence. Of course someone can claim that a champ is just full on broke on all skill levels, but then you have to show some kind of proof for that to not be an opinion and be a fact. But something that is unambiguously garbage about what Riot is doing RN is saying that modes like TT are getting thrown out because they say people don't play them, but why? Because they don't manage these modes! Nexus Blitz, Ascension, these modes get no updates while this luck based Little Legends streamer unboxing bait gets constant changes for more attention, even going as far as to make this glorified online poker ranked while letting modes that actually feel like you're a player wither. Then they blame the community by saying that no one liked the modes they let languish.