Because Armadillomon kept saying "Drill of Power" every single time he Armor Digivloved into Drillmon, even though his Digitama was the one of knowledge, and every other freakin' Digimon said they were the "BLANK" of whatever it was their egg represented. Shit was so fucking annoying. There was one time he said "Drill of Knowledge! I know it's Power, but I think this one makes me sound smarter!" Oh god how I raged. Seriously, what the fuck.
Plus, you keep eating Prune yogurt through a bag with your Grandpa after kendo practice. You have absolute shit taste in yogurt.
Also, when you became a lawyer, you kept having to get new suitcases because Armadillomon kept sitting on them. Yeah, Like I'm trusting you with keeping me from going to jail for 47 years.