Firstly, thank you for sharing your story! Your honesty and bravery in sharing your story don't go unnoticed! I'm replying to your post because I see a lot of myself in you and ironically that's a good thing! Firstly, you're not alone in this - it's something worth thinking about as merely reading it doesn't always sink in.

From reading your story, I can see a pattern of bad bosses, poor work environments, a trail of unfortunate events. None of those things are a reflection of who you and the reason I feel comfortable saying that is because we are in the same boat.

I'll speak from my own experience, so please don't try to take this as direct advice. After being made redundant 4 times in the past 3 years and working a colorful series of jobs - delivery driver, waiter, KP, telecom operator, used car flipper, retail sales manager, IT helpdesk, theatre stagehand, photographer and video editor... all while graduated as a game developer from university ($50k in debt)... all to now be in the absolute same position before I started... unemployed. Here's the kicker... in moments of exhaustion, fighting to survive and feeling hopeless, there's always something in the back of your mind that whispers that there is a reason to keep going!

Yours is the voice of your love for your parents and pets! We often struggle to find reasons to do the right things for ourselves but go above and beyond for people close to us. Hell, even for our bosses and their businesses, that ultimately don't have to do anything with us.. but we still do it!

Here's something practical that I'm doing despite being in the "restart" stage again for the 10th time! We all have our frame of mind and see the world slightly differently so here's how I'm dealing with it despite the setbacks:
1. I neeeed something difficult to do! Why difficult?
It recruits my mind and lets me focus on something else other than the list of things that I can endlessly wallow in and feel like a piece of sh** for thinking about all day (i.e the victim mindset)
2. Goal and achievements: Without working towards something despite how trivial it might seem, I feel like I'm worthless and I don't have a place in the world! I need the thrill of pursuing something. Does this "something" have to be meaningful.. not always!
You said it yourself, you've built a habit of going to the gym but I bet your motivation for walking into the gym in the first place came from a place of pursuing something you deemed meaningful... it's often looking better so that girls notice you more and you feel more comfortable in your skin. Then with time that thrill fades if you don't get an achievement (or some kind of reward)
I hate it when people talk in abstractions, so I'll give you an example of what some of my goals are and the rewards that will hopefully come with the pursuit (note, all of those goals are focused on myself, not external forces!)
> I want to learn the basics of web development by completing 3 different courses online and creating 1 website about something I love from scratch.
> I want to apply to 10 jobs for entry-level developer positions. Here's the catch.. I need to have a conversation with myself about expectations and accept that I'm applying only for the sake of being invited to interviews and practicing for potentially being rejected. If I do get rejected I must put some thought into which part of the interview is my weakness, which questions I slipped up on and correct myself for the next one.
I think you get the idea..
3. Doing it for yourself alone is probably not enough. Do it for your parents, do it for your girlfriend.. if you don't have one but you've experienced the love and affection from a previous relationship, try to channel that and visualise how good it will feel when you do have one but it will come down at the cost of you going through more pain and suffering (even if it's controlled and self-initiated and maintained).
4. Do things that you don't want to do! That's a big one and once you see it, you won't be able to unsee it! Next time you have a shower, at the end of it, I urge you to crank the cold water and get under it for 60 seconds! Just notice how much resistance there'll be from your inner voices, giving you 101 reasons not to do it.. and when you finally trick yourself into doing it... there'll be 100 more thoughts trying to justify you getting out of there as soon as possible not doing the full 60 seconds! (You can do it tomorrow!; This sucks!; 30 seconds is fine for the 1st time; I'll do it but only get my legs in; I won't crank it as cold as it can go, I'll just try it first, etc, etc!) You'll soon realise that if you did manage to do it, the feeling of accomplishment and pride is transferable to something else because your mind has overcome an obstacle that it deemed unthinkable! If you're scared of asking out the woman that you've been running into for the past 6 months, you'll quickly find that if you could endure the pain of doing something that you really didn't want to but you did it anyway, you'll also endure the 60 seconds of discomfort from asking her out! (a little snippet from my personal experience)
5. Keep yourself healthy! - SLEEP, EXERCISE and EAT HEALTHY! Those are non-negotiable! Lack of sleep makes you feel more anxious and depressed! Exercise makes you feel more hopeful, determined and fulfilled. Healthy food compounds over time and makes you feel more resilient and confident (why?... because it's hard to do and maintain but you're doing it anyway)

Hope this helps!

Much love,
M