I use VMWare Fusion, (version 13.6.4 because 25H2 has a bad scrolling bug that makes it unusable for me) and it does implement bi-directional copy/paste, and you can also drag files in and out of the VM (there's a few tricks required to make it work sometimes) but I've only tested this for Windows 10 and Linux as a guest, not macOS as a guest.
Re: Downloading, I have the same issue. What I do is note the note the SHA2 for the file on the official download site, then find a copy somewhere else on the internet [0], and verify the SHA2 of that file matches the one on the Broadcom web site.
Fusion feels very much like it's on life support.
0. For example, https://www.techspot.com/downloads/2755-vmware-fusion-mac.ht...