cannot get out of Windows Insider program

The fact that you have to wipe your entire system to get rid of the Insider updates is completely unacceptable. I mean TOTALLY unacceptable. I have had to disable both the insider and update services because your latest update trashed my system and the only way I could get back on was to restore to the most recent restore point. THAT'S UNCONSCIONABLE! There should be a way for me to shut this off without having to completely rebuild my laptop! I've had to restore to a restore point FIVE TIMES because there's a problem with the update. At this point, my only solution was to disable updates until someone at the Insider Program gets in touch with me to figure out why all I get is a black screen and a pointer arrow when I reboot after an update. Please provide an email or link when I can discuss this more directly with someone.