To the OP:
As we’ve said on the CR before in regards to national hechsherim: internet forums are not bound by libel restrictions that would keep us from openly discussing which hechsherim are “bad.” Unlike the CRC, we don’t have a publish a massive list of “good” hechshers and leave everyone to do the math when we all know people just want to know which ones are bad.
My point is, for efficiency’s sake, why not invert the question. Which hachshers in this variety do people not like?