So after another random crash I thought it would be more productive to list you my problems than rage.
Here's what I had during my playthrough (lvl 220-ish) :

-CONSTANT sound bugs, that seem to affect many other things.
So I had the "sound levels are very bad" issue, where footsteps are way too loud, then people speaking, then every other sound. This got fortunately fixed as I changed my 2.1 sound system for christmas. I had a 10 year old low end 2.1(hercules), changed for a recent low end 2.1 (logitech), now sound is more balanced and I finally can hear music without having super-mega-loud footstep noises. Still, would be cool to have more sliders.
Other fixed issue : VERY long delay before starting any conversation. Fixed weirdly by turning off cloud saves and deleting any existing cloud save.
Now the not-fixed issue : super long delays for random sounds (mostly weapon noises or screams/grunts, but also sometimes musics and longboat chants). These sounds/music eventually play, but often it also freezes the game before. This bug is the worst sound related since it happens everywhere, everytime, plus it often affect the entire game.
-Random loading times, everywhere
I can't find people having my problem on internet, and it's the most boring bug (?) to me. I literally can't use horses or longboats in England since every 50m all clutter disappears, the game freezes, and I have a loading time. It does seem better on foot but still happens, some oldschool Morrowind vibes here when you must wait every 2 minutes for a 20s loading time. Now I would understand if it was hardware related, but I'm above min specs. And it's weird I seem to be alone with that problem (Also I do use a SSD). I tried everything with the graphic settings, specially the clutter one, nothing works. I even tried way under 1080p and it still happens. No difference for this with low/med/high settings. It happens less in Norway, everywhere in England, be it in towns, stonghold or in nature. It seems the sound bug can trigger this, since after the loading time I sometimes have all the buggy sounds and the clutter loaded at once. Weirdly again, it does seem a bit better with AA on low. But I'm not really sure.
Sometimes I can move my camera around : this looks like it's a loading time "on purpose", these happens the most in large towns. But most of the times it's just freezing, with a loading time logo. I do hope it's a bug and not the usual thing if you have low specs, because playing with Morrowind-level of loading times is really not what I would call normal in 2021.
-Game shutting down randomly
Doesn't happen a lot but still it ended many of my sessions, including the one I was having just now. Just the game closing completely, no crash report, no warning, no freeze, no Uplay window, I play and suddenly : desktop. I have no clue about what triggers this, sometimes it's during a battle, sometimes I just walk around, sometimes I'm talking to people. Obviously it doesn't save too.

I have many other bugs but you seem aware of these, so I'll end here. Sorry if some bugs are already listed, couldn't find them.

My apologies in advance if this topic already came up somewhere, I haven't found it anywhere, so here we go:
I killed Steinnbjorn today (Ultimate Edition, PC). He was the last legendary animal on my list and he's as dead as he can be - but when I returned to my settlement and the hunter, no dialogue started, I got no reward and the "legendary animal sheet" ist still empty on the last spot (I assume this is the Steinnbjorn-slot?). Did I do something wrong? Is there something to loot on Steinnbjorn that I missed perhaps? Or is this a bug?