I’m more biased against Google than against Microsoft, and as mentioned in another comment, the search engines are proxies of the respective companies, so it’s hard to give an objective opinion.

Now, what I would suggest, trying to be as neutral as possible, is to test both and see which fit your needs more. After that, use mainly the better one and keep the other as a fallback option.

Regarding wonky links, I can’t say I’m familiar with the issue. You could try checking Mint’s desktop files to see how the commands are set up, and if they work fine manually through the terminal. If they don’t, that’s probably an indication of where the issue is.

Regarding videos, those are… problematic, some times even on Windows (FF Type-0 and Mary Skelter PTSD intensifies). Perhaps you’re missing a drive, or Proton’s equivalent of winecfg may need some manual tinkering.

And regarding auto-mounting drives, are they being automatically mounted to a static path, and before Steam is loaded? Also maybe deactivating Steam’s auto-start, if it’s active, helps?