Trump wasn't on the ballot in Virginia. He wisely stayed away. Youngkin didn't have any glaring personal issues. There are two separate issues:
1) should character count in selecting the nation's leader...I'm agnostic on this, though I do think given the President does some flag waiving it is of some (but not overarching) importance. It's a rational position to say it should count as 0%...but only if you give it a pass for both sides (otherwise you are just doing the partisan warrior thing)...that means Clinton and his lady friends shouldn't have been part of the conversation if you are consistent.
2) does character in fact count in selecting the nation's leader. You are one out of millions of voters....unfortunately for you the reality is that for many people it does matter. How much does it matter? The way to probably think about it is as power boost in a video game....a positive boost (such as winning a war a la Eisenhower or Collin Powell) might get you a bonus on top of the issues but can't save you from a very negative position....a negative penalty can sink you particularly if you have a good opponent (or in Biden's case one that chose to use COVID to hide in the basement and then just be a blank slate to everyone). The reality is Trump is toxic so he'd be going into 2024 with an overwhelming negative penalty. Could he still be Harris? Maybe...depends on facts on the ground....but he's starting with an anvil on him.
p.s. I'm no Romney or Jeb! fan....I've been saying since lawschool the problem with the Republican party is that they have a leadership more concerned with coddling elites than willing to fight. There was a moment in the debates where Romney could have turned it....he was asked about the Republican Party....he could have said "for far too long the Republican Party has been concerned with the rich and well off instead of working americans" but he's not that guy.
I'll say it again, I can understand being unable to get off a hill when you die on it, but my point is the vast majority of non-emotional voters don't die on this hill, and Virginia was a clear example in many ways, here are just a few:
1) Youngkin publicly sought and Trump publicly gave him his endorsement.
2) I believe Younkin ran the same type of campaign Trump would have - he ran on his own two feet, focused on God, country, education, social issues, jobs, and taxes. Also, he brought in no (R) politicians or outsiders, especially not Washington establishment types.
3) Last night on the nation's #1 cable news show, Youngkin, in his own words not mine, publicly and directly acknowledged Trump's robocalls as very significant to his election.
4) Youngkin benefited greatly from Trump's continuing hispanic shift (Note: Google a local election result Tues in San Antonio TX for another amazing hispanic shift).
4) Per Wash Post:
Youngkin - "Favorable of Trump" +90
McAuliffe - "Unfavorable of Trump" +66
To the contrary, your points regarding Trump and personality were on full display in Virginia.
1) I have family in Virginia and McAuliffe flooded the airwaves with anti-Trump messaging and went heavy tying Youngkin to Trump.
2) McAuliffe pulled out all the stops bringing in all the democrats biggest "personalities" including; Obama, sitting Pres and VP, celebs, national teachers union leader etc etc etc.
3) The media did their part throwing the whole trash Trump playbook at Youngkin and using the tired race baiting drivel, shamelessly on a black lieutenant governor and hispanic AG.
Your points were directly tested in Virginia and clearly failed. But don't feel bad, as you can see in this thread there is plenty of company on that tiny hill.