Held Broken Packages

Some things i try to install give me a "held broken packages error", eg. MyCroft (and quite a few others)

I have tried the usual:

apt-get update, upgrade, dist-upgrade, autoremove & -f install

Doesn’t help.

I get nothing from…

dpkg --get-selections | grep hold

Running Synaptic fix broken packages, says everything is fine

Attempting to force installation using Aptitude, and it wants to pretty much uninstall my entire OS lol

Also some installations say i have unment dependencies, which are already installed, even the exact version requested (eg. libasound2-dev)

Running out of ideas? Are there other ways to fix broken/held packages?

Ubuntu 20.04