Nolan is apparently well known among viltrumites, the ones that confront him on thraxan say “so this is the great Nolan.” So he has a reputation as a powerful fighter even among viltrum, and there’s nothing to say any of the viltrumites that attack him were as old as him or as powerful.
I think this really comes down to you not liking the scene, which is fine, but ultimately nothing is out of place or wrong. Mark has been seeing noticeable growth throughout the series and viltrumites get stronger as they get the shit kicked out of them, similar to Allen and saiyans from dbz.
Nolan is apparently well known among viltrumites, the ones that confront him on thraxan say “so this is the great Nolan.” So he has a reputation as a powerful fighter even among viltrum, and there’s nothing to say any of the viltrumites that attack him were as old as him or as powerful.
I think this really comes down to you not liking the scene, which is fine, but ultimately nothing is out of place or wrong. Mark has been seeing noticeable growth throughout the series and viltrumites get stronger as they get the shit kicked out of them, similar to Allen and saiyans from dbz.