This probably wouldn't be a problem if I weren't so critical of myself.

Same.

I spend too much time being frustrated inside my own head, and that makes it easy to use that same tone when I'm interacting with other people.

Same.

My Dad's neighbors always say:

Hurt people hurt people.

And as a counterpoint to that, from Slavoj Zizek:

Never presume that your suffering is, in itself, a proof of your authenticity.

Just because we wrestle with ourselves internally, it doesn't justify our perniciousness to others.

Uncle Iroh nailed it:

Sometimes the best way to solve your own problems is to help someone else.

I just don't wanna sound like an asshole when I attempt to do that!