I have an (UK) ordinary degree in mechanical engineering. Is it worth the paper it's printed on?
It sounds like you're under the impression that fancy degree = job. That is incorrect. Fancy degree is nice and all but it's only the first cut. You will need to back your degree up with actual job search skills as well as technical skills.

For the former, this isn't the right Stack Exchange (use The Workplace). Read up on all the CV-writing, cover-letter writing, interviewing techniques, etc, that are necessary to get hired. Also be sure to make use of your alma mater's career center, if they have one. They'll have not just job listings, they will usually have counselors who will help polish your CV.

For the latter, I hope you didn't slack off during the degree because there's no substitute for it. If the interviewer asks, "here are two vectors, what is their sum?" you need to be able to answer because if you can't, then the rest of your CV is called into question. Make sure you know the basic coursework, and if you can keep up-to-date with the latest news in the field, even better.

Job searches are not easy. Unfortunately, you'll have to help yourself, because society doesn't owe you a job and nobody else will be able to help you pass the interview. On the other hand, they can be done: after 8 months I'm pretty sure many of your cohort will have found a job, and if they can do it, you can too.