I can appreciate your frustration. However, rest assured SGP works for many, many users, so what you have to do is take a step back, take a deep breath, and (1) analyse your setup and (2) your SGP configuration.
You can help us help you by describing your equipment - mount, PC, ccd, connection methods/leads, hubs, power etc, SGP version. This may seem elemental to you but it will be invaluable in identifying any issues. Be as specific as you can.
Take screen shots of your SGP configuration, sequence and equipment profiles and post them. Describe as specifically as you can the steps you take when trying to image a sequence.
Post the log of your attempts and this will help the developers identify any problems.
Without the above it is very difficult if not impossible to help you.