The problem is NOT with astrology generally . . . . I believe that the issue is with the validity of 'synastry' charts .
The greatest insight (my opinion) will be produced by placing your birth chart on 'an inner wheel' and on the other wheel place the other chart . . .
and then see what energetics present themselves . . . . squares and oppositions will provide the greatest insight .
you can download (Windows 32 bit) a limited free astrology program that will allow you to do what I suggest . . .
here > http://halloran.com/dlwin.htm#ast4win
I believe that 'synastry' charts may provide 'intuitive insight' but , beyond that , are without significant value .
Best Regards ,