He looks OK to me. But I'm not expecting all pros at every position. We have a top 5 defense and he's a big part of it. Wallace is 3rd on the team in total tackles and he's tied for 1st in solo tackles. Maybe, just maybe you're looking for this week's whupping boy and don't appreciate when he makes a play. He's made plenty of good plays this year. For every "bad" play he's made, I'm sure if you tried, you could find 3 or 4 good plays. I found 2 with limited video. When Conner shook Hyde out of his shoes, guess who helped bring Conner down? Wallace. Pittsburgh's final drive, 1:31 left to play and Conner gets a dump off pass. Wallace comes up and makes the tackle, even though the WR blocking him is holding. And the cherry on top?!? Wallace gets the game ending INT.
https://www.espn.com/nfl/team/stats/_/name/buf/buffalo-bills