There's most likely something more to this than the phone itself. What problems have you had? There are a number of apps that can make the phone function poorly. Have you installed any anti-virus or task killers? Some of the more prominent issues are caused by popular apps like Lookout Mobile and Advanced Task Killer.
It would be more helpful to post what your issues are than to post a general statement about how you dislike the phone. This is a forum to help people with specific issues; please use your therapist for the more general problems (and it sounds like you need one!).