That isn't typical of Apple hardware or software, current or past. Venting here might make you feel bettyer, but we're all just users like you. You probably need to talk to Apple to get those problems sorted out.
One thought, though: Were these replacements for older Macs? If so, how did you transfer everything from the old Macs to the new ones? If you used a cloning application lile Super Duper or Carbon Copy Cloner, or if you restored from a backup, you get just about everything, good or bad, from the old Mac. That often leads to unexpected results. It's usually better to use Apple's Migration Assistant to transfer via FireWire directly from the old Mac to the new, or from a recent Time Machine backup if you have one. You get a lot less garbage that way.