Safari crashes on Google Maps and in "Settings > Websites" (Mac)

1. ...
2. Delete everything Safari saves using cmdline (see here, Note: some commands returned "Operation not permitted" even when doing "sudo")

Those were good ideas at the time but lots of things have changed in the ensuring eight years and many of those suggestions no longer apply.

The good news is that you confirmed it affects only your User Account, so it is fixable, with the caveat that it may take a very long time to isolate the sole cause — or — you may have to cope with losing most or all of your desired Safari settings.

First try the following: Clear Safari's history and website data.

Clear your browsing history in Safari on Mac - Apple Support

Manage cookies and website data in Safari on Mac - Apple Support

I doubt it will help.

Assuming the problem persists a time-consuming search and destroy mission for Safari-related files in your User Library may be necessary. To read about what you may be up against read *Unable to open safari at all* - Apple Community. That link will take you directly to the resolution. His problem was more severe but muhammadwasee_m eventually fixed it.

Short of that, and if you prefer, contact Apple Support and pester them: Official Apple Support. I can almost guarantee their first tier support representatives will be stumped, and will almost certainly have you go through the motions of reinstalling macOS. You are welcome to try that before you call, just so you can tell them you did it already: How to reinstall macOS - Apple Support. Reinstalling macOS has worked in rare cases, but yours is a rare case.

If that solution is acceptable to you it will certainly be less time-consuming than painstakingly attempting to find the file or files that may have become corrupted. Be sure to back up your Mac before doing anything (which just goes without saying).

I suppose yours is one of those rare cases in which reinstalling macOS worked.