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
Mark was holding back tho? That what the pep talk is for. He’s used to having to hold back to not break buildings or hurt people. So for once he got to use his full strength and it definitely caught the girl off guard.