question about national certificates and the point in them.

Your post is a little rambling, obviously because you're upset at the situation - have you got any more specific questions or concerns? Clearly there are jobs for graduates to fill - apart from anything else, they're delightfully cheap labour. Having some form of experience will absolutely help with this; ideally internships (ultimately even unpaid ones may be worth the investment in terms of 'getting your foot in the door') but your courses will increasingly include relevant projects that you can spin, too. If it would help assuage your fears on this front, you can use e.g. www.unistats.com to see 6-month graduate employment prospects for various courses. You will find that, political correctness be damned, there is a relationship between perceived 'reputation' and employability of graduates from different institutions.

Or are you talking less about graduate jobs and more about those available to you just now? You may find that applying anyway is worth it. Alternatively, try to exploit any contacts you have available, search harder (some, admittedly not many, jobs do explicitly advertise that training will be offered and/or that no experience is required) or submit speculative applications. Investigate apprenticeship or training schemes. These do exist in the IT sector, which (if I'm reading correctly) is what you're interested in.

If you can tell us more about what sort of jobs you're looking at, we may be able to make more useful suggestions.

But, basically: no, life isn't easy. Seeking further qualifications may or may not be appropriate for you at this time, or any time. But do remember that, like it or not, some doors will be effectively or entirely closed to you without the pieces of paper that these courses will give you, regardless of whether you feel or even are capable of performing any task that would be asked of you. It's down to you to decide whether this door-closing is relevant and obstructive to your aims or not.