No I do not see him as a backbencher on the opposition benches. He was barely seen as a backbencher on government benches after all. Far too demeaning. Like it would have been to face a commons vote on the committee findings and possible recall vote.
We can tell from his spending that he has a liking for the trappings of high office. He lives way beyond his means. And attaining the office of pm was similarly way beyond his actual ability to do the job.
Sure, before pesky covid came along, to scupper his plans, he expected to be PM in perpetuity.