You're right, objective isn't the word I was looking for. My lack of vocabulary for a better word limits me in this regards as I can't convey what I want to say. I don't want to say it's subjectively bad because that would only apply for me. I could list numerous factors on why league, for the most part, is a bad game. Many, at current, is not really enjoying ranks.
I've played with thousands of different people and I have to say tensions are overloaded within the game. People dislike it in droves, far more than the boards can portray. Just look at any pro player/streamer and see who actually has fun playing league. Everyone is getting burnt out and tired of the same design mistakes happening en masse.
When a game goes from a fun past time to bitter frustration, regardless of wins and losses, that's when you know that it isn't living up to what a game is meant to be. League is more of a chore rather than it is a game. If one was to make a poll or riot did a survey of the fun factor of league on a scale of 1-10, I guarantee they'd get more 5's and 4's than anything. People play league for lack of others in the genre.
No other game is as vibrant and smooth as league's gameplay. However, that's all league currently has over the other games at the moment:
A simplistic outlook of the genre, with impactful and "cool" abilities. I guess this would be seen by some as "fun" but there are multiple games innovative visuals that just can't be considered all that great. I'm being very vague with my use of the term "bad" right now, when league has went from a great game to just a slight "okay-ish" game.
But, the fact is, when you have a game with as a repetitive nature as mobas, those visuals and smooth gameplay can only take you so far. "No 2 games of league is the same" used to be true. Now, the matches that are played out generally go along the same route. Junglers clear 1 camp, rush for a scuttle crab. Mid laners hard shove wave to try and contest, river fights constantly happening for one jungler to come out ahead. The losing jungler then gets invaded by enemy mid laner and jungler. Bot lane gets camped and snowballed, proceed to group and force teamfights. And now games are over.
That's the generic formula of playing league now. Which is why I used "objectively". But, I guess it still doesn't fit because it's still all personal opinions and feelings.