Stuff happens unfortunately. Nothing is perfect. Could be a bad batch you got? <shrugs shoulders>
The problem with assessing paint protection performance over a period of time is that there are just too many variables in too many uncontrolled environments. Application, maintenance, vehicle exposure to elements, etc. all play a role.
While its obvious something is amiss, determining what that exactly is, is the greater challenge. Its easy to generalize and imply that the coating is "not as good as it claims" but I think that's a bit premature (and unfair) given that there doesn't appear to be any evidence (yet) to indicate that a large number of others have experienced the same.