Thanks, I'll give those settings a try.
Interestingly, your summary there is literally the exact opposite of mine, you started out liking it but the more you played the less you liked it, whereas I am 100% the exact opposite, I started out liking it less than Origins and Odyssey but the more I played it the more I liked it and I now rank it above Origins in terms of gameplay (Origins looks better etc but I actually enjoy the gameplay in Valhalla more). I still rate it below Odyssey but thats mainly because I have a special affinity for the time period that Odyssey is set in. So my 3 go Odyssey > Valhalla > Origins.
Also one thing I forgot, turn HDR on and off. I find that when you open the game again the HDR is different. Well, you can actually see if maybe you prefer it that way. The HDR luminance also resets to 1000 when you switch HDR on/off so remember to put it back up.