It's great to hear that your health continues to improve. It's angering and frustrating to hear of how you've been treated; I too "fell through the cracks" ("polite" term) of the health system and can 100% relate to your experience (including the PTSD). I believe everything that you said.
Some "random" thoughts that may (or may not!) help you to move forward:
1. You weren't responsible for what happened to you. You ARE however responsible for working on your mental health going forward. Some may not understand that statement, so please let me explain further:
Many who have been victimised by past events choose to remain victims going forward, but in my (pragmatic) experience, using prior trauma as an excuse to avoid putting in the hard work to move forward doesn't help long-term. The best path is usually not the easiest path.
So I'm not saying that recovering from PTSD is easy - I'm not saying that it is quick - I'm not saying that one has to do it alone - I'm just saying that one needs to take responsibility for driving it. The past does not have to equal the future; being victimised in the past does not equate to us being victims for life.
2. Pick your battles. You're quite right; our medical system is broken in many ways (and also competent in other areas). If you can be part of a groundswell that changes it for the good then that's fantastic, but attempting to do that will come at a price -- and it's likely that any efforts will be ineffective. Is it fair? ... nope - absolutely not; but that's the reality of what's been dealt regardless. My encouragement is to think carefully about where you expend your time and energy; both are limited quantities - and putting too much of both into something that's not going to change anyway is probably a poor investment. It sucks - it absolutely sucks - but nothing in life comes with a guarantee of fairness. If we "jump in the deep end" of trying to change it the reality is that we'll probably just sink. And no, it doesn't feel great to have to say that.
3. In terms of on-going funding, one of the few things I've learned in life is that "a little" contributed by "a few", consistently, adds up to amazing things. I'm not a wealthy person, but I'd be more than happy to setup an AP to chip in a few dollars to you each and every month. It's not money that I would really miss - and I'm sure that many others doing the same wouldn't miss their contributions either; I think that that's far more likely to happen than repeat contributions to Givealittle. In a country of 5,000,000, just image the impact of just 1000 people chipping in just $10 a month to help your recovery. My encouragement is to explore that route. Sign me up as contributor 0001 if/when you're ready.
Hope this helps :)