Sad to see this Mori, you've been maybe the most levelheaded and thoughtful user I've seen in my short time here. I hope this move helps reignite your joy for the game!
There really is something about GMing the ISFL that causes it to take in great, committed members and spit them back out wanting to completely leave the league. Been an issue since S8 when I joined.
Don't know what can be done to fix it but just look at the number of 1 or 2 season GMs and you'll see a big trend.