My wife has an Ioniq 5, and it has lots of the same annoying quirks. On top of what you said, another huge annoyance is their train wreck of a phone app and that often times the digital key doesn’t work (at least not consistently).

Be forewarned that a couple of your annoyances are present in the R2 as well:

• the drive mode always resets to “All Purpose” when you start back up. It does save regen, suspension, etc. though.
• only adaptive cruise control, far as I can tell.

Those aren’t an issue for me but I get it.