Bruno is indeed a best midfielder, but among Manchester United players he looks very selfish in the field. I am not not looking at the positive side, but the attitude displayed by Bruno sometimes damages all the systems being built by Erik Ten Hag.
Bruno is a good midfielder but he is only a best midfielder in Manchester United. In Premier League, he is not the best midfielder in my opinion. De Bruyne used to be a best attacking midfielder in Premier League but in this season, he has some troubles with his body and with changes in Manchester City. Another midfielder is Martin Odegaard from Arsenal.
I don't think Bruno is too self-fish but I see sometimes he tried to shot by himself. However, I consider it as natural ego of star players and he can do this after making a lot of key passes and assists in Manchester United.
I don't underestimate Sevilla, they were a strong club and has good records. But you can see how the condition of this club currently, they are very different from previous seasons. With the current squad and their performance during this season, I'm not sure that this team can give difficulty to Man United.
IMO, among the teams in the quarter-final, I think Man United is the favorite team to win Europa League title.
Manchester United are one of strongest clubs in quarter finals of Europa League and with their latest excellent form in Premier League, they are considered as one of best candidate to take the title. However, Sevilla has support of history and they are holding record in Europa League. It can be one of elements to help Sevilla make surprise in matches with United.
In knock out matches like coming ones with Sevilla, players like Casemiro is important. With his experience in Real Madrid, he can help Manchester United to control midfield and reduce danger from Sevilla. I consider Casemiro is a key player for United to beat Sevilla.