Sigh. At least one, one time a MC with a functioning brain would be great. You let the orc evolve instead of killing it and now you get all emo about your stupid mistake? IDIOT, retard, braindead.
How many chances did they have to kill this thing when it was vulnerable? At least 3 times?
I hate a story that uses the stupidity of the character to prolong the conflict. Leaving it alive the first time should have taught him/them the consequences of that.