Sometimes it is not easy to understand why one loses motivation.
But I think it has something to do with being burnt out and losing interest in almost everything.
As for steemit, I really think you got burnt out
You wanted too much, you wanted to help everyone and started developing to give steemit a new front-end. + all the other projects you started.
I'm glad to see you posting again, your posts are rich in content and a pleasure to read
There's plenty of truth in what you say - hopefully it's just a bit of winter blues which a spot of nice weather will help with! (And a good night's sleep 😴)