Companies that use leetcode in interviews are rarely worth the effort or risk/reward to interview for. Getting into a like FAANG dev team is doable by anyone memorising that stuff, but it's rarely worth it.
Try out talking to a recruiter, and find a job with a senior that can help guide your career. Your self-esteem is pretty low, and a good senior and mentor can guide you out of that rut, and into being a senior yourself in no time with the amount of work you say you're putting in.
I did this for a while, but it's just more convenient to separate concerns and have long running sessions separate from IDE's restarts and crashes. As for the Warp's business plan - can't imagine there being many teams that would want this kind of complexity handled by terminal app and not CI pipeline.
Try out talking to a recruiter, and find a job with a senior that can help guide your career. Your self-esteem is pretty low, and a good senior and mentor can guide you out of that rut, and into being a senior yourself in no time with the amount of work you say you're putting in.