No, I understand exactly what you’re saying, you’re stating that people doing free work owe you things, and I’m stating that the licence absolves them of all obligations you claim they have.

Besides, you have not stated on what basis the developer “owes” you support besides attacking them and other commenters in this thread on an ad hominem basis.

If you wanted guaranteed support, you could ask the original author if you can get a maintenance and support contract for their application, where the limits and costs of that support are outlined in the contract.