I think we would be much better off using traditional html, bootstrap scss, and some jquery for interactions. But nobody likes to be boring so React it is.

React itself isn't really the problem because there are some valid use cases for it. However, it's currently being thrown at every web development problem even when there are better and more stable solutions.

But if I had to use React today, I'd stay away from MUI for sure since they constantly demonstrated a lack of maturity.