I am actually thinking lots about how the Bucky fanfiction scene after Captain America: The Winter Soldier delved so deep into how that level of torture and mind control would actually affect a person, and the fragmentation of Bucky's personal identity, in many cases exploring how Bucky would never be the person Steve knew ever again.
They explored the effects of PTSD that he would suffer and realistically dealt with how it would affect him mentally to be not allowed to make choices, to be mentally and psychologically abused to that extent and how he would struggle to adjust once he was safe. They even dug into the uglier realities of torture as it exists in real life, showing Bucky as a survivor of sexual violence
Also, lots of fanfics portrayed Bucky as being physically disabled after his time as the Winter Soldier. Like, there were multiple fics I read where he has a feeding tube that described that with realism, and several more where he has various GI tract difficulties after being tube-fed throughout his stint as a living weapon. Multiple fics that describe him having seizures, at least two fics where he is addicted to heroin and suffers withdrawals from that, also fics where the arm is removed and he has to adjust to life as an amputee
And then, when you return to canon, of course they're not interested in the long-term mental and physical effects of The Horrors at all, except for a little bit of Hollywood PTSD.
Film franchises rarely explore the actual physical and mental effects that would be suffered by action heroes due to the events and injuries they endure in canon, but the level of investment in the Implications on the part of the fans vs. the actual people in charge of the franchise is SO stark here.