Hey there idiotic younger me full of optimism. I know you want to believe the underdog can win. That broken system can be fixed from the inside if you throw enough rationalism, reason, and grounded statistics at the problem. Trust me when I say in the future people will be questioning if the world is round or not... and cementing their head in microwaves for youtube likes. Might make you wonder what the point of a reasoned anything is... I know you want to believe that justice can prevail if you harness enough law and beat ignorant abusive assholes over the head with it. But hate to break it to you bud, life is no Disney film. Go read up on the Just World Fallacy. Save yourself some time and misplaced hope.
My advice before you dedicate much of your existence to going on a crusade to put a dent into toxic institutions and help others escape smiling monster, (which in truth is just you projecting how you wished someone had crusaded for you in the past...) Please simply don't. Sure on a small scale, you may help some but it will cost you everything in the end. Have you writing cathartic messages to yourself on a website such as this. More driven out of boredom a desire to outrun sickness and restlessness than anything meaningful.
So go be a vet instead. I am serious. You like animals and they won't betray you. You can't slay the tiger from the inside, it is utterly deluded to think you can. Disappointment will shatter your soul and you will witness it damage others you care about. Your already broken soul will wind up shattered into even more fragments that you did not think possible. That crushed whole will find warped solace venting amidst the other people who have had their own souls shattered beyond repair, ready to choose a hastened demise over further pain.
In the end, you will just get digested and shit out by said tiger. Left in a wasteland of cynicism. To the point that becoming a serial killer almost seems justified in moments, just as a means to redress the injustices at work. Don't eat, sleep, rage. Instead help guinea pigs, wonderfully adorable guinea pigs. Otherwise, you will simply find yourself shaking hands with grinning vultures and using economic reasoning in a manner that will make you sick inside.
Guinea pigs may bite you and draw blood. However, they won't threaten your integrity. You won't compromise yourself to achieve something 'of a greater good' that vultures can provide. Politics is ultimately empty, and much of charity as you believe it to be is an utter scam. Businesses are not interested in providing, they just want tokenism and the benefits it comes with. Nothing more. You can't educate bigots. You can't alter entrenched systems with logic. Are you an oil Baron? Banker? A giant conglomerate of some sort? Got large donations to give? No, then trust me when I say pulling the humanity out of inhumanity is just not possible when that very state is what helps the vultures feather their own nest. You can't argue with greed and self-interest.
Give up, watch Disney films instead if you want your justice fix. Maybe read the word in the dictionary as in truth that is the only place it truly exists.
Also, get out of England, it becomes Orwell's 1984's airstrip one, but as if it had mated with Catch 22.
Lastly, if you do start getting stomach pains and get fobbed off repeatedly by your doctor because of the mental health issues you have. Threaten to sue them. Or if they are so confident get them to waive the protections that would allow you to genuinely sue them for their personal assets. That way, maybe, just maybe you won't wind up perpetually vomiting in a bucket and resenting you have to die because the pain of it all is just too much. As you lament your former career having killed off the best parts of you.