I have done over 40 bug reports on the Construct 3 github and my experience has been pretty decent with the response and efforts to fix the problems.
I think the problem arrises if you are reporting very vage issues without enough info or no steps to reproduce.
I think well all know from making games as well, that it is almost impossible to fix something if you cannot reproduce the bug and don't know what causes the issue.
But on the other hand I also understand that it's really bad to be in that helpless situation where you have a bug that really hinders the workflow that cannot be fixed.