Report is too slow

Oh yeah, nesting multiple SUMXs inside a SUMMARIZE will definitely slow things way down, especially if there are a lot of rows in whatever you're SUMXing. As a first step, I would recommend installing DAX Studio and learning how to use that. You can run test queries to find out how quickly or slowly a particular measure will run, which will help you find the major sources of slowdown. Then you can focus on those measures and see if there is a more efficient way to write them. I'll play around with your example measures to see if I can come up with any better methods.