I'm not sure that it would be entirely ethical for forum members to find sites and say that they are bad. We can comment on sites when invited to by their authors and we recommend good sites but I certainly wouldn't feel comfortable singling out sites I considered bad.
It is very subjective anyway - for instance if I were doing the project I wouldn't use your good example - because I, personally, don't find it particulary outstanding. But that would be for me to argue. You have to make arguments for it being a good site. It doesn't mean that either of us is right or wrong - just that we are looking for different things from a web site.
On the other hand there are no doubt some things that we would all agree would make a bad web site - a dark font on a black background that no-one could read for instance (yes, I've seen one!)
Decide what you think would make a web site "bad" then do a search for "mp3" and keep looking until you find one that matches your "bad" criteria.