That fight clip of one mesomorph knocking around a few poor ectomophs in pretty funny.
Although meso does what lots of mesos without training do.He throws only this right hand over and over and with the form as if he is throwing a football, not a punch.
Still, endos without training tend to slap punch, which is even worse.
I still contend that in general mesos tend to dominate not due to their superior explosiveness, but rather due to cultural bias that has shown young endos that superheros all have muscles, and they always win.
The poor mesos get incapacitated by fear.
I base this on fights like that clip, where the meso expends lots of energy but accomplishes next to nothing and the endos look at each other like "Well, he sure exploded at us... I guess that means we just got beaten up and should quit, right?"