You don't have the whole picture or the correct understanding of the details. Suunto did NOT expose you to any danger, to the contrary, it was too protective and conservative; it certainly did not "screw you." The computer would get you up to the surface during the dive, it won't abandon you. If you miss a required deco stop, it will keep beeping and blinking at you the whole time with arrows pointing down. It will do everything possible to get you to go down to your stop except hitting you on the head or pushing you down. If you still ignore all of the warnings and alerts and proceed to the surface, the Suunto computer will not allow you to go down in another dive for 48 hours (I think) which is very prudent and conservative. It will work as a depth gauge timer if you go down again before the 48 hours are over.
Most dive computers in the recreational diving realm are the same more or less.