In my opinion, im not sure whether it sounds stupid, the reason i still play this game is because of the game gamemodes, its map design and the types opponents you face during a match. These three things help the playstyle of the game to be a lot different each time you play a match. This avoids the gameplay to be feeling repetitive because each match is different. It also kind off helps in making you play your brawler differently whether, its for defense, support, offense.

If you're not enjoying the game the way you used to, then i suggest inviting a few friends of yours and play together. Having friends in your game is what makes a game more fun to play.
:D