Profootball Focus completely disagrees with you guys. They believe he had an excellent game.

https://www.profootballfocus.com/blo...aiders-week-3/

Linebackers Strong Against the Run
They may have been without James Harrison but the Steelers still got some very impressive play from their linebackers. None of the four graded negatively for the game, and three of them scored very well against the run. Lamarr Woodley (+1.8), Larry Foote (+2.3) and Lawrence Timmons (+3.3) all showed very well in the run game, and constantly knifed between blockers to make stops in and around the line of scrimmage. The four linebackers combined for 12 defensive stops and just a single missed tackle.
Though Harrison is obviously a major loss for Pittsburgh, they will be pleased at how Chris Carter played in his stead. Carter may not have graded spectacularly (+0.2), but he made plays in the game and wasn’t exposed the way some players can be at that position.
D-Line Needs Reinforcements
I routinely wonder what some Steelers fans see in Ziggy Hood (-2.4), to the point that I’m actually checking plays more times than I normally would just to make sure I’m not missing some extremely subtle and under-the-radar level of dominance from him. It’s just not there. I was actually shocked in this outing when he made a good play in the run game–and even then he was beaten to the tackle by Timmons. Despite 36 snaps rushing the passer he failed to generate any pressure whatsoever.
I understand that might not be his specialty in this defense (though given his college background it probably should be), but if he’s out there for 36 snaps against the pass he needs to be able to make himself a factor. Otherwise he is just dead weight, because he rarely commands more than one blocker. In the end it was another poor performance from Hood and, as Casey Hampton (-1.3) isn’t getting any younger, Pittsburgh need to find some linemen going forward.