It's one of those things you get really hooked on for a while. Besides gameplay there is the cosmetics and lore about what it actually is. I started playing a little over a year ago and for about 6 months I played everyday non-stop for 4-7 hours. Then I kinda got bored... I still play it, almost daily, but only a game or two.
It's kinda fun when you're trying to level up to get Lootboxes to unlock new stuff. But... once you get to a point where you have 85% of the unlocks for all the characters, if you don't play comp then it's super repetitive.