Notch has said a lot of things over the years. Many after the sale to Microsoft were not so great. Suddenly without purpose and more money than he would ever need in a life time, he found a new purpose that wasn't so great.
A lot of Qanon rants and other conspiracy things. Just goes to show you that some times it is best you don't get what you wish for.
What is he up to recently? Did he come around?
I have been following him, and I think a lot of the claims about him have been exaggerated. He stopped being so edgy on twitter after watching the "this is phil fish" video. It is an interesting watch and applicable to notch.
https://www.youtube.com/watch?v=PmTUW-owa2w
He is developing a new voxel-like game called "levers and chests", and before that he has shown us a few cool webgl demos I find interesting.
https://www.youtube.com/watch?v=JYMy7TPsNd0