I was looking through some code I wrote 10-15 years ago. Seriously, WTF? Makes me want to invent a time machine to go back in time and punch myself in the face.

That like me, except 6 months ago

I can be like this on a day by day basis

I can imagine how this would go down from the younger me's point of view:
*bzzzzzzzp*
'Woah, me from the future? You built a time machine to come back and tell me how awesome I.... *SMACK* WTF?!'
'Get your act together you little sh*t.'
*bzzzzzp*

Don't be so hard on yourself. Everyone has to learn :)

Hey that means you've become a better engineer!