Do you guys think it's fine to leave a company even if you're a team leader and currently working on an important project for them?

Because I feel sad, underpaid, and abuse on this company.

It seems to me like you already have all the answers you might need.

I'd put in a two weeks notice first, but yeah.

Although I have all the reason that I need, but my ego is telling me to finished what I started, and I'm quite concerned if that's a good thing to do (as professional) because you're unhappy on what you are doing.

Do you think the company would hesitate to get rid of you if a new manager or CTO comes in and changes the company's direction, or the company has a cash flow problem? They wouldn't, I've seen it happen plenty of times. You only owe the company what your contract says, if it says 2 weeks notice, don't feel bad to give it.

You feel like they deserve commitment and finishing the project.

But you deserve to be happy at work. They didn't hold up their end of the deal.

Don't get me wrong. Some jobs are not glorious or fun. People probably don't want to be garbage men or toll booth attendants. They probably don't go home and take out the trash "as a hobby." But we are developers, hackers, designers, engineers. And the fact that you (or any of us) are on here, shows that you like this. It makes you happy. You enjoy reading code and talking to programmers and making machines do our bidding (not without their share of complaints about "syntax errors"). So if you are doing that and not happy about it, then its their fault. Don't feel bad about that. But do follow courtesy. 2 weeks. Don't be a dick about it.

Also: it will never be done. Either it will be scrapped and another project will fill it's place, or it will succeed and endless bug fixes, feature requests, rolling releases, etc. Nothing is ever done.

Same situation with my old company.

Dipped, said 🖕to everyone, turns out that as time passed since I left, most of the people moved on or got laid off from that company and that could have been me lmao

I guess it's time for me to leave. Thanks guys :)

Remember, absolutely nobody isn't replaceable. If you don't enjoy your job, leave.