Il just assume you are in the US market. Sounds like you need some guidance on the interview process, you might be applying to the wrong type of jobs, you might want to be more selective/directed with your approach/goals. Maybe you are unable to adequatly prepare for interviews due to your current day job. You should have a plan, how long you can practice interviewing before running out of money, and then go from there. Maybe you can try get a less physically taxing day job so you can study/practice more after work until you get a great dev job.

Ive interviewed for some basic software engineer roles in the US NY region with Node in the last 2 years that basically just wanted basic JS experience to work there without any production Node experience. No 8 hour tests, just general discussions, and build a CRUD app that handles X type of object.

Programs like Outco(costs money) exist to help software engineers improve their interviewing skills/try get more money in their next job, even if they are experts with great experience they take these classes because interviewing can be hard for some devs.

If i were you i would spend a day or two researching the current state of interviewing for JS/react roles. Its a big market, lots of devs talking about succeeding in it online.

Start talking to currently employed software engineers for specific advice on your current issues. Fish for referrels, this is the biggest way companies hire nowadays in US in my opinion.