Tried, but there is a lot of caching of processes in windows to make the experience faster and smoother.
Most websites are heavy and what I mean by that is they have a lot of javascript, so its not just downloading stuff, its then having to run that stuff which is an overhead the rpi cant quite handle. I dont know if the javascript executing on the rpi can be optimised but I suspect the javascript is better optimised for Intels and AMD's.
The mouse is too twitchy, it needs a bit of damping to make it smooth moving over the desktop and hovering over buttons. I suspect there is a bit of AI in windows which predicts when someone clicks a mouse button that they actually wanted to click the mouse button over the screen button, ie something to improve the accuracy and experience of windows.