Others would have died in this situation long ago. He should be profoundly grateful for the care of the Fate God, instead of complaining this and that.
He's in unbearable pain, but he's still alive. You can't be too greedy, can you?
Even if this excruciating pain were to last a month, it's still better than dying immediately or suffering a lifelong disability, right?
He should grit his teeth and get through it.
And he ought to feel thankful for his good fortune, to still be saveable in such a condition.
Pummeled by a devil lord, one punch hit his belly, another his spine. Yet, he suffered neither ruptured organs nor a broken spine.
All he felt was intense pain.
He should also thank the egg. Though such aid was but a trivial effort for the egg, others would have no way to access such an opportunity.