It sounds like you really gave your all to your employer, and it left you feeling demoralized and depressed. It also sounds like you feel stuck. Stuck in the situation, stuck in the bad feelings. My heart goes out to you.

At times, I’ve put an unhealthy focus on work, and it’s left me feeling drained of life. Probably a similar feeling to yours.

It sounds like your schedule isn’t allowing for much human-to-human connection. (Away from computers!) I don’t know about you, but that’s probably the main human need I have when I overwork! I’d suggest limiting the evening learning sessions and try to invest in some friendships! Try to brighten up someone’s day!