The thing is as a consumer I sure as hell can judge things from what I saw. I don't care if it was the smallest or largest effort. Again, you seem to be betting on a whole lot of what ifs, and I'm not going to risk my money because I saw a developer promise things and they did not deliver. What would I do? I'd keep my mouth shut until I had decent build of a product to be shown that fulfilled the goals I made. I'd also have had an NDA so my unfinished product wouldn't have been talked about online. Also, I don't care if they said their app was ready for release or not. That's a text book strawman argument because I never implied they said it was ready for release. You are putting words in my mouth. I'm basing my decision on my own observations of what exists and how they handled the app.
As for the kickstarter, let's look at what kickstarter actually does. It allows the developers to show off proof of concept and promise features that will be in the app. Hmmm, let's look at them showing off the app for 5e at various conventions, I believe in that case they showed proof of concept, and promised features that would be in the app. They failed to deliver with 5e, so what makes you think they are going to do anything different this time? Do you see where I'm going here? Fool me once shame on you, fool me twice shame on me. It also appears I'm not the only one that feels this way based on these boards and how much money they have generated so far.
So let's recap the reasons they won't be getting my money. First, my experience with the app first hand did not live up to my expectations, what I saw was trash. Like you said they might have had a great program behind the scenes, but I didn't get to see that app, I'm certainly not going to base my judgement on what ifs. Second, I'm not going to give my money to someone who failed on their first attempt and wants nearly half a million dollars to attempt it again with a core ruleset that is almost infinitely larger than 5e. Seeing how they fumbled so hard with 5e's rules, I'm not going to be part of that train wreck of making an app for pathfinder's rules considering the depth of the system. Third, I don't care if it's legal or not, no information has been conveyed to me about WHY they lost wizard's support. That sounds extremely sketchy to me. So whatever reason it was, it harmed their image to the community. At this point all I know is that something bad happened, if I don't know WHY it happened, the only thing I can look at right now is that something bad happened. It leaves a bad impression especially without reasons of explanation.
Also a tertiary (quadirary?) 4th reason is I don't run pathfinder, but that clearly has nothing to do with the app itself, but I figured it deserved mentioning.