I'm not going to tip a delivery driver who was super late
That feels very rude, why won't you tip the delivery person?
He was being an ass wipe on top of being late.
That's the reason tips exist!  Companies should be paying their delivery guys a fair wage anyways, instead of relying on us to do it for them.  Nevertheless, since he was so awful it's totally fine not to tip.
You know what? You're right. I shouldn't tip him but I'm still going to be rude to him.
I wasn't recommending that you be rude towards him, I was just acknowledging that it was right for you not to tip him because he was rude. I suggest you still act respectfully and be the bigger person in this case. You need to be more understanding and more respectful towards service persons and people in general even if they can't reciprocate that.