The answer to the OP is it is pretty difficult as a fresh graduate unless you do a specific degree that has opportunities abroad. Things to do with engineering, earth sciences, nursing, etc open up doors abroad but in many other fields you would not be employable abroad straight after uni but with a few years experience you may be (eg financial professionals who do something like an accountancy or actuarial professional qualification here can find opportunities abroad when they qualify).
As has been pointed out, the UK employment market is quite good relatively speaking, despite the fact unemployment now is worse than it has been since the early 1990s here, we still have lower unemployment rates than a lot of other countries especially in Europe. Getting jobs in the EU is difficult even if you speak the language.
A lot of people on TSR have a romanticised idea of the global job market as being flexible where you can just apply for a job and get one and get granted a visa, but the immigration requirements outside the EU are tough and most fresh graduates with no experience are not going to get granted work visas abroad.