Sorry to hear that - you should try Look'n'Stop which is the firewall i use, its has the same learning curve in that its pretty hard to configure as its a proper firewall but its the mutleys as it has a small memory footprint, does exactly what it should do and has NEVER given me any jip, unless you include the amout of time it took me to work out how to set up my own rules. The default ruleset is supposed to be excellent but i went the whole hog and got the Phantom ruleset with it (which can now be got for free) and im more than happy.
It is about $30 though - but like i say its the mutts.
http://www.looknstop.com/En/index2.htm
Dont be fooled by the cheap web page - its a solid brick wall this one.