It's a great shooter made by one of the best teams in the business (Unreal Tournament team). The mechanics are solid, and it's a fun game. They do inventive limited time game types (they keep it fresh). But then they slap on meta mechanics that deepen the addictive nature of the game: gambling (random loot boxes), dailies, weeklies, and seasonal 'quests' that just unlock token aesthetic items.
Personally, I don't play it because I waited too long and the core mechanics have a distant skill cap (building magical fortresses instantly, and dropping on your unsuspecting/confused opponent from above with a shotgun) and I have other stuff taking up my time (1000 hours in PUBG, for example). Plus the game was clearly designed for the younger audience (... yadda yadda, I suck at it).