Suffering, in and of itself, isn't a skill. You will endure iff you want to endure. That is, if the perceived benefits of enduring outweigh the pain.
I've suffered through multi-week hikes with blisters and a too-heavy pack because I loved the views, the remoteness, the self-reliance and asceticism. And also because there were no good alternatives, because bailing midway would have been a different kind of emotional and logistical pain.
I've also bailed on things. Not a ton of them but always with good reason. I quit a job I hated after trying to suck it up for too long. I quit my college sports team after barely getting played for two years. I left a long-term relationship when I realized my partner wasn't treating me well.
I don't think of those bails as failures. They just didn't work out, and I'm happier without those things in my life. In fact I'm proud of myself for putting aside my pride and fear of being a 'quitter' in order to pull the plug on them. The hikes I suffered through aren't successes, either. With experience I've gotten better at preparing and packing, so even longer and more challenging hikes are easier for me now. Better views and more comfort is where it's at. No need to suffer just for the sake of suffering.