Oof, six months ago code is the worst. It's still close enough to your current style that it's undeniably yours and you can vaguely remember writing it, but long enough ago that you've improved a decent amount since then. So the mistakes or bad practice hurts the maximum amount.

There's an argument that if you are not ashamed by your old code, that means you didn't progress as a developer.

But six months ago, it was the greatest code you've ever written.

I am my own worst enemy

Never had that feeling in my career. Then again, I didn't work at places which chased deadlines instead of pursuing clean code