He’s what? 18? Basically nothing in viltrumite timeframe.
Literally gets dominated by Lucan using one finger.
Then he gets his ass beat by Thula, who has hundreds of years of experience minimum, mind you viltrumites get stronger with age, aaand somehow a pep talk allows him to almost kill her? What? Mind you, in the comics this Thula threw down with Battle Beast and walked away alive
I think viltrumites also get stronger everytime they’re pounded to oblivion, and in the show that happens to Mark a lot. Especially after Battle Beast he should rebound stronger. Although I bet Thula’s been hurt quite a lot more times than Mark has in her lifetime.