It's easier for me, because I lean left. I have voted for a lot of Republicans at the state level though, because I've seen Democrats completely mismanage their states (like CT where I'm originally from). I did not feel raising corporate taxes was the way to go and I supported DeSantis over Gillum. I felt uneducated about who was running down ballot this year and only voted for the presidency/state amendments. I did not vote for my congresswoman (who will win easily since it's the city of Tampa), because she never responded to my question I emailed to her about her position on a FTT. I'm not a partisan and don't vote straight party tickets. I too feel the Democrats need to take a tougher stand against the violence/rioting/looting in our cities. I also feel Trump needs to take a tougher stand against right-wing extremists. I feel bad for local business owners that had their businesses hurt by them this summer in Tampa. That's the responsibility of local officials more than the president though.
For president, I would have had a harder time with voting for Bernie who's way to the left of me on economic issues. I would be much more afraid of his potential for executive overreach. I can make a conservative case for Biden though if you think future years out. While he's more liberal than me on most fiscal issues, I do think Biden is an institutionalist who respects the norms of the Senate even though many in the Democratic Party are trying to push him to the left. My view is that if Biden wins he's going to have a very slim majority for him in the Senate. It's going to be anything from +1 GOP to +3 Dems (IA,ME,NC, and GA will decide this). I think there's enough moderate Democrats who will protect the filibuster if that's the case. If Trump wins the Senate map is really bad for Republicans in 2022. Since we know historically that midterms typically bring backlash to the incumbent it would set up 2024 pretty well for the Democrats. If Trump wins in 2020 he will drag down whoever is running in 2024 as they will have to fully embrace him to get through the primaries. Whoever comes out of the Democratic primary might be much further to the left in 2024 as they'll argue that the establishment moderates couldn't get it done after defeating Bernie.
For SCOTUS, it's very likely that Trump will not get to appoint another justice if elected. Thomas is only 72 years old. He's showing no signs of retirement. Breyer is 82 and looks to be able to stay in office 4 more years. There will be pressure for him to retire if Biden wins, but that won't change the balance of SCOTUS.
Another thing I feel is that if Trump wins, it's very likely there will be no constraint on spending. He and Congressional Democrats are much more willing to spend than Senate Republicans (even though they're much more willing to spend under a Trump presidency than an Obama one). It will be like Bush 2007-2008 where the budget ballooned with a Democratic Congress and Republican president. No new taxes, just unconstrained spending increasing our debt to GDP ratio higher and putting the question of our fiscal stability in jeopardy. There will definitely be high levels of spending under Biden, but there will also be tax increases. You may not agree with the tax increases, but I think it's a lot worse to spend like drunken sailors without increasing taxes.
I think the risk of spending is greater under an all democrat government. But other than that, I can't argue with anything you've said.