"Ungrateful ones"
I mean, don't say you are going to release on a certain date and then postpone
And then postpone again.
They are much better off just not announcing any dates at all and just releasing when done. Instead of making promises and continuing to break them anyways. The latter is the same result as the first, but now you're also pissing people off.
Also, some of those "ungrateful ones" are people that are paying through something like Patreon for their product.
I don't think you've put much thought in your post at all.
Yes time management and communication go a hell of a long way, especially with these kinds of situations, but sometimes things can happen unexpectedly to the developers (writers block, loss of family/friends, health issues, etc.) and as unfortunate as it may be if the issue is too personal the developer may not want to talk or even post an update until they get their situation under control.
As for the "ungrateful ones" I am referring to those who abuse, harass or attempt to slander the developers. YES some of them have paid for it and YES patience may be stretched but acting in such a manner does not help the situation. Questions, comments and trying to find out what is going on is one thing but when people start screaming about how they own the developer, how the developers have to work for them and even outright threats THEN it becomes a problem and can even affect the mentality of the developer. I'm not saying stay silent but patience, maturity and the right kind of questions will go farther than just screaming out slurs and threats.
I have also seen the opposite side of this as well where developers are arrogant, greedy and just see the patrons as free money but from what I have seen SJ is generally a decent developer who may have a hiccup here or there but tries to do the best they can both for themselves and the patrons. And I am not saying the patrons for SJ are ungrateful, I am saying I have seen OTHER developers suffer due to a lack of patience, poor communication and misplaced anger and do not wish for SJ to become another to fall in such a manner.