Please keep things positive. Best advise I believe is to try out different sites. Find what works well for you. If you don't like it, don't go back and try another site. Nothing says you only have to play on 1 site. At one time, I played on about 6 different turn-based game sites.
Try the "Lost my password" link on the login page. Even if you haven't forgotten it. since you login with an email, you get a new password to the email. It sorted me out once. No guarantee, facebook is a monster site.