Fans from opposing fanbases are up at arms that is all that he received. Some wanted multiple game suspensions, and freelance writer Ken Campbell, insanely wanted 25 games.
Jacob Trouba has only ever been suspended once, where he sat out two games in February 2017 for hitting then-Ottawa Senators forward Mark Stone, in the head.
The league also fined Jacob Trouba $5,000 for slashing then-St. Louis Blues Vince Dunn, in January 2020. That's it. So there is no "history" of dirty play, and if there was, it's far and few between his career.