Remember that It's just acting! Only writing! It's play! Make believe!
Everyone produces really terrible work sometimes if not often.
Why all the misery? Why beat yourself up? It's just pretending, It's out in the playground making up stories.
Why so serious? Because it's your life's Passion? Then have a nap, and start fresh in the morning.
It's fun and games. We're movie makers, this is all!