I think it deserves its praise. I played it for a few hours. The mechanics are solid and any game that promote team play is always welcome. Now if you ask me if it was better than Rainbow Six Siege... That's another poll and another discussion altogether.
I think it deserves all the love it gets! I do think it can get a bit repetitive, though, which you can alleviate somewhat by switching between heroes every now and again. Other than that, it's an excellent game.