He's gonna end up being neglected and miserable, but hey, as long as I follow through on raising him through huh?
You think I want this? No, I fucking dont, but he deserves better.
Then be better. Isn't that what this whole thing is about? Your stepmother asked you to fix your stuff. I have to say she doesn't sound very understanding, but that's besides the point. You are talking about disowning a pet. Those are your words. Your ditching a life you took responsibility for, because you need to 'fix your shit'? That's not fixing anything. Saying you need to focus on work should not mean working 80 hour weeks. You should be doing the work you do well. That leaves plenty of time to come home and feed your cat and ensure it has what it needs. This is a sentient pet you're talking about. A cat you've had for two years. You have to realize you are not making rational decision when you're saying throwing out a cat is the right thing to do, so you can focus on not making bad decisions.
Doing things like this is trying to solve your bad decisions by making more bad decisions. It seems you think that this means you won't have any free time, or time to do what you want to do. That's not being an adult. Being an adult is accepting responsibility, like being on time for work and fucking taking care of pets whose life depend on you. If you have an issue with spending all your money on cat toys, and sit around in your pajamas, playing with your cat instead of going to work, you would make a better case as to why you can't have a pet. However, even then, removing the symptom isn't fixing your problem. it sounds like you're over-correcting. if you're wasting your time on things that doesn't give you anything, like mindlessly scrolling on your facebook feed for hours on end for no enjoyment, restrict yourself from those time sinks. Don't remove everything all together, because the moment the feelgood from 'getting your shit together' ends, and you are back to what made you over-indulge in the first place, you will find your life lacking and start over-indulging again.
Also, none of these things has anything to with taking care of a cat. Please don't think you're getting your life together in any way by abandoning those that need you.
EDIT: while I wrote this up, posts have been made, outlining that the cat doesn't have a good living arrangement. I think your parents are absolute dicks for forcing your cat to be locked in a tiny room. No wonder he meows and doesn't have a good time. Being away for 14 hours in itself shouldn't be an issue for a cat, but it's obvious this situation isn't good, no matter how much you're home. Cats need space.
The reason you got so much fuzz in the first place is that you worded your first posts really terribly. Disowning a cat isn't a good way of putting it. Giving him up because you feel he won't be happy is another thing. But, if you think changing your life to working and studying 14 hours a day won't burn you right out, you are wrong. It might feel good for a while, but you'll be in a bigger rut than ever in not long. You need to figure out balance in your life.