If anything, your question reduces to making one party sound incompetent or deceitful, I don't know if that's intended. (And considering that aspect of the party is another fun can full of real-life worms.)
Based on the parent comment, I think it's more "one party sound incompetent and the other deceitful". There was a senator who used to say that American politics was a contest between the stupid party and the evil party.
I thought so in my teens. But now I know that I was naive. How can you be sure that you're not?
But if you've spent the time since your teens to come to the opposite conclusion in spite of everything going on around, then I suspect there will be very little I can say to you that will make sense to you.
We would not have a costly war in Iran, blockaded Strait of Hormuz, $6-7/gallon gas, or blanket import tariffs hiking up the prices of consumer staple goods if we voted for the “party that promises bigger government and does deliver.”
I would submit the idea that the latter party is consistently misrepresented and has been the only one that has delivered smaller budget deficits anytime recently.
See also: Tax Cut and Jobs Act, the Kansas Experiment.
The truth of the matter is, our elites are undertaxed at historic levels. At no point in our lifetime have the wealthy been taxed at a lower rate than they are today. There isn’t actually anything wrong with government spending outside of the endless/aimless wars (started by…). It’s the revenue side that deserves scrutiny.