No need to worry too much dude, there will always be people like that all the time, keep moving forward and prove what they think is wrong.
It's better to prepare all aspects in advance than to rush to try to get listed where the jack doesn't end up doing well.
Only hunters who are too eager to dump their reward are in a rush and don't really care much about project development, if the team are working on the technical aspect to ensure successful launch of the Jacs product i think it is better to have a complete working product than the one full of bugs, good thing team will only do what is best for the project and not what some desperate hunters want.