Why does my internet want me to kill myself in frustration?

So about two and a half months ago we upgraded from dial-up to a wireless internet card. Yay. Not really. At first we were unbelievably excited, till we hooked it up and it was slower than dial-up, because it was on RTT/1X. Then it went onto a DO signal, which made it a million times faster. Then back to RTT. Basically it switched back and forth and stayed on RTT 80% of the time, until we got an antenna for it. We hooked up the antenna on the roof and connected it to the internet card and it went on DO most of the time and all was well. Recently, though, its been randomly going on dormant, or going back to RTT, or simply not connecting for any real reason.

So has anyone else been massively disappointed by the switch to broadband and all the lovely little bugs it comes with?