Expecting an equipment vendor to design anything is wild to me. When I buy a breadboard or microcontroller from an electronics distributor, I have never expected them to help me build a circuit.
I have no clue where people created this "support" expectation in a diy market. I have been part of diy drones, anamatronics, beam robotics and many others, and the solar crowd actually calls the distributors needing help. Why? I read the manual and find everything I need.
I think these vendors need to stop providing support. Leave it to the manufacturer or the manual to dictate how a product should be used. If it doesn't work as advertised or it is difficult to use, post a video on YouTube and show the world. These products are dead simple in my opinion. If there are hang ups, tell others.