Why can't i play a single disk game i own anymore

Hi. My name is Brilliant and I am happy to assist you today.

I will need more details on your query to assist you appropriately.
Kindly add where you want to play the games: Console (Confirm which console) / PC / Mobile Device? Also add how you're unable to play the games.

However, here are a few Xbox troubleshooting tips you can try:
1. Check for known issues.
2. Restart the game.
3. Power cycle your machine.
4. Test your network connection.
5. Try using a different profile.
6. Remove and re-add your profile.
7. Clear the local save and resync with the cloud.

For more details on the above kindly visit: https://support.xbox.com/help/games-apps/troubleshooting/game-issues-solution

I hope this helps resolve your query.

I can't stay connected to live if I'm playing a single player game whether it's on a disk or off of the hard drive.

If the digital games in question were free games with gold you need gold membership to play them again

True, but it isn't treated the same as water or electricity and I'd have to pay over 400$ just to get it. That's more than half of what I get a month, there's no way I could pay for that.

I have done this, the problem is still ongoing. It won't even show I have games installed, even disk games. I've found a workaround, I put all my games in a group and the games show up in the group, but I have to press list(start for us old timers) and go
to manage game and then click the game in my installed list to start them. It works, but every new game has to be added to this group or it won't show up, and the method to actually start a game gets tedious real fast