All I can think watching this is that Cubix runs on a combination of Solex and the power of love and friendship. These generic chorebots shouldn't stand a chance even with the Solex power-up.

Cubix's power is supposed to be beyond compare. Like, I distinctly remember it being a plot point that Cubix is just, objectively better than almost every other robot. Maximix had an existential crisis over it in one episode.