@Hank Morgan is fukken great. He is accepted after you clear something up.
It's somewhat confusing to me on why, after he was saved by a Witcher and given the opportunity to become one, he believes it's a good thing that Witchers are dying out, and that he wishes he could have lived a normal life rather than be a Witcher. Isn't the fact that his family was brutally killed the reason he couldn't live a normal life, and that vengeance/prevention of further butchering worth the Witcher trials as well?
Soldiers and magic could've done that job, but kings and sorceresses alike were too busy plotting against each other instead of against the monsters in the land to bother with it. Instead humanity relied on witchers while also actively persecuting them, destroying their homes, erasing their culture and spitting in their faces wherever they went. Morgan no longer believes that humanity deserves witchers to protect them. If humanity no longer deserves witchers, then he didn't have to become one. Arthur could've brought him to an orphanage and Morgan could've been a blacksmith or a farmer or a poet and married a pretty lass and had a whole bunch of babies, and he would've been blissfully unaware of just how undeserving humanity is.
Or at least, that's what he believes. It's a nugget of self-pity and misanthropy that lies at the core of his being. It developed over the years; when he set off on the Path, he saw things the way that you described. Then humanity beat that naivety out of him. Unlike Aidann, Morgan has no memories of the heydays of the witcher caste to cling onto, back when they were treated with respect and gratitude and humanity was too weak and ill-established on the Continent to defend themselves. He only knows xenophobia and ignorance and the few exceptions he encountered along the way weren't enough to balance the scales.
It's pretty hard to explain because it's so contradictory. Morgan is a complex guy and it took me quite a few days to work through his mindset while writing.