How do I know if my systems any good?

Does it make you want to listen all night?

If so it is a good system!

Good luck with the recovery!

Ultimately, your ears will tell where the strengths and weakness are.

You could read professional reviews of your gear and see if you notice those details in your system.

As I get older I’ve modified my system to have a musical, inviting, and relaxing sound vs. ultimate detail and resolution.

You have to like the sound of your system day after day so adjust it to make yourself happy not comparing to a better system that day after day is not your cup of tea.

My 2¢

Honestly gauge it against a pair of headphones. Headphones are a good gut check to see how your room is too. Headphones have issues too like pad bounce in the cups that cause issue around 2k but most good ones are very good.

The best advice I have is to set up your speakers 2' away from you and listen that way.  If that sounds great but your listening location is not you need to think about your speaker placement and room.

Play this song when you power up your system...

"Here’s a little song I wrote
You might want to sing it note for note
Don’t worry, be happy
In every life we have some trouble…"

Bobby McFerrin