I like your first drawings of the skylines.

Whether you loved them or not after, I think it is amazing and probably the most important part, that you are putting your hand back too it. You are in a different place, situation and mind space possibly than you were when you previously created a lot. (from what you say) I think all of that makes a difference, but maybe only for a little while. I bet if you keep doing it, the flow will begin to join back with you.

I hope it felt somewhat good, just to be doing something that is starting again, something that you have loved. Give yourself time and try still let yourself enjoy it and not judge yourself so harshly. I know that is easier said than done, but it is a good thing to work towards.