I was playing the game with my surface book 2, whose hardware should support this game well. The crashes occurred when I entered a shop, when I was running in the frontier, and when I was in the middle of a main quest with 3 optional objectives, etc. The pattern was simply random and the crash report windows never popped out when I was forced to see my wallpaper again. I couldn't stand it anymore when the crash happened again during the first mission of Tyranny of King Washington.

I was also bugged when I tried to remap the ship controls. The character controls was remapped with it, so you can't remap any of them alone. I reported it to Ubisoft support, with a video of this bug after their first response, but their second response was teaching me how to remap. Although they finally realized this is not a trivial issue, I still doubt if they even care about it.