No. Saying that the fighter sucks is. Like come on dude...they're in a cage fighting and you're sitting on your ass talking shit.
It can be because of an adrenaline dump/bad cut...
Still, it must suck to have to actually go through it. Being drained and having a world class opponent that is about to put all his/her energy into hurting you
You mean like this?
It's not an excuse, it's a reason for performing poorly.People act as though it's something unnatural or unusual,like fighting with an injury,sickness or anything else.
I don't think having a poor gas tank,even just for that night only is a valid excuse.