I've never seen such rubbish in all my life!
Most students are NOT there through Clearing, and you do NOT need bad grades to get in. Nobody I know, including those who do Law, got in through Clearing - there will, inevitably, be some who did; but then, there are some Clearing students at every university barring Oxbridge and maybe LSE and Imperial. There are no more and no less than at any other 'redbrick'.
Swansea requires grades in the area of ABC, BBB, BBC - this is the same as many 'redbricks', including some of those you mentioned, such as Reading.
As for chavs - to say that the university students are chavs in simply a lie, plain and simple. There are quite a few chavs in town, ie. locals, but the actual students are NOT chavs! And about private school people - there are some of course, but again no more and no less than at any university.
The people making these comments are very ill-informed, and look as though they have some kind of grudge. Even the comment about there being only 3 clubs is not really true - apart from these there are other more alternative places, and of course there are all the bars on Wind Street and elsewhere into the bargain!