No one at WHMCS meant for things to go bad. Would you rather have an open security issue than a patch that, at least, solves the security issue?
It is a tense situation, not only for you but of course also for the WHMCS developers. So rather than becoming so emo just give them your support and be patient.
No one cares about your temper and anger won't help you one byte. It will just make you stand out as an ugly person.
Please act professional and do not post emotional responses.