How are you transferring the files? If you aren’t using segmented/parallel transfers you’re gonna be in for a bad time. I’d recommend using mscp (cli/command line tool). I use it often and I max out my local 2.5Gbit line when pulling downloaded ISOs from my box.

I just use Homepage as a bookmark/landing page so I remember what containers/services I have up and running so that I don’t need to check via terminal/portainer. Portainer/docker-compose files for managing services and that’s pretty much it. If I was using a dashboard I feel like I’d be wasting more time on an already time consuming hobby.