Does Sentinel know it was his fault that he is a spider? I'm sure at first he blamed Optimus and Elita for what happened in Archa Seven (even though it was his idea), but as time passes he knows it was his own fault for suggesting his friends that they go?
At first, he’ll blame them heavily for leaving him there. He won’t even admit to himself that he was the one who initially persuaded them to go there. His main thought will be that they left him there.
Among the Decepticons, however, he’ll fall into depression, and his hatred for Elita and Optimus will turn into longing and sadness.
Over time, he’ll yearn for his past life and eventually regret that they went to Archa 7.
Eventually, he realizes that his decision had these consequences














