Offhand anecdotes here as I only have Ubuntu on a 2012 MacBook.

That said the error post update is likely just a service that didn’t restart properly. Many of these are not necessarily critical, does it say what program crashed? A reboot would guarantee a fix here.

Unfortunately the issues with apps might be the snap packaging, this does slow apps down a bit which could cause pretty much all the remaining issues. I haven’t personally used it but might look up flatpak as a replacement and see if that helps. If others don’t explain how to do this I will try to come edit this later with an explainer or link or something to help.

For as much hate as it gets Ubuntu (or kubuntu for the kde version) will feel very familiar in usage and will have a newer kernel. It’s my default it just needs to work distro if regular Debian isn’t an issue due to drivers or something similar.