Imagine having a giant mob willing to march and take the fucking capitol, doing it while the police supported you and the army looked to their bellies, and not even getting concesions out of it. WORSE: your movement and party is shitting itself after it.
I really believe they could have pulled something IF Trump wasn't Trump.
What would they have pulled? They refuse to leave the building until Trump is president? Won't happen, even if Trump tried to go full coup. The fact the "mob" was unorganized, had no demands, had no real power etc is the whole reason they got into the building in the first place, if it was an actual possibility for a coup it would have been shut down
They would get concessions, if they had any solid demand besides "Trump4evar"