Btrfs balance crashed now no free space on disk

So I manged to free up about 400GB by deleting my steam library and that allowed me to finish the balance operation however now I only have 80 GB free and can’t reinstall my steam games

https://i.imgur.com/6FlfANA.png

EDIT:
Apparently, I needed to run another balance afterward. that seems to have gotten me my disk space back…

EDIT2:
I think I still might have some lost disk space?
tried this

sudo btrfs filesystem usage /
Overall:
    Device size:		 931.22GiB
    Device allocated:		 794.06GiB
    Device unallocated:		 137.15GiB
    Device missing:		     0.00B
    Device slack:		   512.00B
    Used:			 559.90GiB
    Free (estimated):		 172.95GiB	(min: 104.37GiB)
    Free (statfs, df):		 172.95GiB
    Data ratio:			      1.00
    Metadata ratio:		      2.00
    Global reserve:		 512.00MiB	(used: 0.00B)
    Multiple profiles:		        no

Data,single: Size:588.00GiB, Used:552.21GiB (93.91%)
   /dev/nvme0n1p2	 588.00GiB

Metadata,DUP: Size:103.00GiB, Used:3.84GiB (3.73%)
   /dev/nvme0n1p2	 206.00GiB

System,DUP: Size:32.00MiB, Used:112.00KiB (0.34%)
   /dev/nvme0n1p2	  64.00MiB

Unallocated:
   /dev/nvme0n1p2	 137.15GiB

which I found out about from here Btrfs and balance - #3 by anon44840303