I agree with you to some extent, but I suspect it's more complicated than these types of people simply coming to terms with one man. The Trump movement and supporters would essentially need to come to terms with the entire "Make America Great Again" brand not delivering on the prosperity they are being promised in order to leave him behind. I don't think these folks are ready to accept that despite Trump's claims, we simply can't revive the long post-WWII era of American prosperity and make things that "great again" anytime soon. For many, I think walking away from Trump at this point, is also walking away from that dream, that dream that America can once again quickly become a country similar to the post-war global superpower America that once existed. Accepting the end of something really good is never easy, those were incredibly good times for many Americans (And also Canadians). I think the Trump crowd can typically look past the things you listed like his families personal enrichment, those things aren't a big deal to them as long as they still believe he can still deliver on the overall MAGA dream being promised by him. And he's still 100% promising to do it and keeping that dream alive.
Unfortunately, we are no longer living in, or on the border of, an unquestioned sole global superpower having relatively recently won the biggest war in human history. Those who are young now, due to things beyond their control, will never get to experience those times. The reality of the unique American post-WWII boom created the best economic conditions to date, ever. After years of rationing, war bonds, and saving money, American consumers were ready to spend when they won the war. American factories already geared up from wartime production answered the call as men returned ready to work. Everything from automobile sales to disposable consumer products were able to reach their absolute peaks, North American's were buying homes for cheap and quickly filling them with appliances. This is only a short summary of an era of complex near-perfect ideal conditions, and it was far beyond the credit of any single politician. Most other countries lay in ruins and needed to start from scratch, were under the steel curtain, or in poverty. This period of America's epic superpower history lasted a surprisingly long time, but like most things it's eroding, as the world regains balance and other countries still continue to rebuild, this period slowly ends. Trump's MAGA brand of politics cannot replicate this period, it's simply impossible, and highly unlikely any of us will ever witness another period like it, as much as people naturally want to keep chasing that dream of the era the baby boomers were lucky enough to live in.
We can all scream and shout, blame Joe Biden, blame JT, Liberal's, Democrats, Conservatives, Trump or anyone else- but it won't change anything or bring those times back for the dreamers. Just like Trump, JT wasn't able to bring back the "Sunny Days" with his branding and management either, nor will Pierre Poilievre's "common sense" politics, nobody can bring that era back. It's mainstream false political advertising aimed at good people who don't fully understand, due often to no fault of their own, exactly why things are the way they are now and why they don't have the same advantages of the past. With such high expectations, it's no wonder people are so often disappointed, pissed off at each other, out protesting, and why politics have become extreme with so many unrealistic promises. I think best case, eventually someday (maybe after we are all dead?) the era of extreme politics dies off and the next generations accepts they still have relatively good fortune, maybe not as good as in the past, and leaves all this crap behind, to focus on things we can actually change instead of believing in fairy-tales. It would probably be beneficial to vote for a politician with simple goals, regardless of affiliation, for example bringing back more history lessons to high-school students, instead of ones promising something grande like post-WWII America at this point. Whatever they find at Mar-A-Lago doesn't change any of this very complex situation, nor does getting rid of any one person or political party, this is a phenomenon that is much bigger than just one man, or one political side, and getting overly sucked into it won't change reality.