The Mac mini has always been like this. Worst Mac to buy IMO.
My solution to using the Mac mini:
1) I don't use Bluetooth
2) I had the monitor wake problem on one of my monitors. I just changed a setting on the monitor and that fixed it.
3) I've had no problems with the HDMI port
It's nice to read about the problems that others have with the product before purchase so that I expect them and can try to figure out fixes and workarounds.
It's a nice system but it's not perfect but pretty good to kick the tires. I can't run my production on it but I can run all of my office stuff - it handles that nicely. It will take a beefier version to replace my Windows desktop.