How do I deal with an advisor who's biased and doesn't give you time?
As Patricia comments, you should discuss this with your primary advisor.  However, you should try to do this in a diplomatic, non-accusatory way.  It this case, there are a couple of concrete points you can make


You have trouble arranging meetings with your pro tem advisor.
He does not give (or rarely gives?) you satisfactory answers to your questions.


And if there is anything useful he is doing, give him credit for that.

Incidentally, what is he supposed to be doing?  Directing you in some reading?  Giving you advice on your research?  Were there clear expectations laid out in advance?