Kamala picked the wrong team for that mission, for sure, she shouldn't have chosen the original lineup for that one. Zzzax is clearly immune to Viv's solar blasts, and Kamala is weak to the villain's electric attacks. Miles's Venom Blast is probably useless too. Amadeus is a sitting duck. Yeah, they were clearly defeated, Miles escapes and does the deal with Mephisto. He can expect a scolding from Kamala later - and from Peter Parker if he finds out.