Don’t think about what would have happened if Jason hadn’t put the handcuffs on Bad Janet at the end of S4x4. Don’t think about Michael blowing up and Eleanor realising, too late, that it was the real him. Don’t think about Bad Janet hiding her smirk and feigning sadness as the rest of them look distraught. Don’t think about Tahani not wanting to talk to Eleanor as she was the only one who tried to stop Michael while his supposed ‘best human friend’ said nothing. Don’t think about Jason feeling bummed out and not having his girlfriend to comfort him. Don’t think about real Janet still trapped in the Bad Place and no one coming to save her. Don’t think about Eleanor trying to get all of Michael’s goo in the container and then she sees his broken glasses on the floor and breaks down in tears because the two men she loves have both sacrificed themselves and left her, and she’s left feeling like shirt for not trusting Michael after everything he did for them.
Tl,dr, that episode could have ended really forking dark.