If it hangs or halts on every error, forces me to spend 3 hours re-scanning my library over and over to get it imported before I even get started
With due respect, that's on you.
If you want to try any new music program, copy a handful of your albums over to a test folder and test it on them. There's almost nothing you will learn from testing it on 176,000 files that you won't learn from testing it on 2-300, except for how long it takes to scan 176,000 files.
You also don't want to risk the new program doing something undesirable to all of your files while you're still kicking the tires.
(And there are plenty of older threads from people who disabled the brakes, kicked the wrong tire, watched their music drive over a cliff, then blame it on the car)
...and I need to turn to third party solutions, suggestions and fixes just to get basic functionality, it's time to move on.
You don't need third-party solutions for basic functionality. There was a suggestion for Foobar, but that was as an alternative to MusicBee as a music player as you had already stated you were moving on.
I've been using MusicBee for managing and playing my music for over a decade, which definitely helps become accustomed to some of its quirks or ways of doing things.
The only thing I've found lacking for my needs is advanced tagging, so I use mp3Tag for that. Now I struggle to use any other music player programs because they don't let me customise the things I want.
MusicBee definitely has a learning curve, but once some of the trickier things click - like say, using virtual tags for grouping albums - it opens up possibilities that you won't find in any other program.
Finally, I think the forum isn't as useful as it used to be for helping new people figure things out. I find many threads in recent years have been from people who couldn't properly articulate the issues they were having or refused to provide details about what they were doing when asked and just gave up. You seem to be savvy enough that if you did stick around, I think there are still enough long-time users here that could help you get over any teething problems.
Bee excellent to each other...