I also see Bruno playing for a team that doesn't win as he's not a great CM and will likely never be. Again, there's more to this than his G/A numbers - his involvement in the middle of the pitch means the team is absolutely ran through every time he plays - like for example, against us, where he was cleverly neutralised and did nothing all game, which isn't and won't be the first time; his partner having to do the work of 2 midfielders because he's not strong or physical enough is great to watch as a neutral United hater, but even their fans can see he's not doing a lot there overall.
If he was playing for us half of this cryarsing would've relegated him to a walking yellow card also, huge benefit to playing for those rats so he can be his true Rat King self.
Because in the next post you said "defensive responsibility" - he ranks towards the bottom for all defensive contributions, and by that I mean tackles, interceptions, and even blocks (among PL midfielders). Garner is among the top, Iroegbunam has well more from all of those despite playing 10 times less, and his teammate with the most in all of those is Casemiro, to no one's surprise as he has to do his job.
He isn't and never will be a "true midfielder", as you put it - '#10' is where he should be.