assurnet – without getting into specifics about specific hashgachos, I will try to explain the issue you are talking about. This is something that I had also wondered about and looked into. It comes up with many other hashgachos besides the ones you mentioned.
There are many hashgachos that are considered problematic hashgachos even though the Rabbanim behind them are chashuve Rabbanim whom everyone holds of. The issue is that there are many hashgachos that are being given for the masses who would be eating complete treif otherwise. These hashgachos are not necessarily meant for Frum people to rely on.
There is a big difference between a Rav giving a hashgacha and the Rav preparing the food himself. He may be relying on kulos that he wouldn’t rely on in his own home because he knows he is dealing with “hamon ha’am” so he wants to make sure they are not eating out-right treif.
You have to also understand that you are not dealing with black-and-white issues here. You are dealing with mass production of food in factories run by not-Frum people, for the most part. You have no idea what is going on. There are so many mistakes that can happen. From what I understand, the idea of a hashgacha is that there was a certain level of hashgacha taking place, enough to give the food a certain level of reliability, but no one is guaranteeing that it is 100% certainly kosher. No hashgacha is 100% reliable, but some come much closer than others. It’s kind of like saying that there are some people whose houses you know you would feel comfortable eating in, some whose houses you definitely wouldn’t, and some who you would only eat in if someone would be insulted otherwise. At least, that is how I understand the process.
In otherwords, you are not judging the Rav HaMachshir necessarily. You are judging the strictness of the standards he is using to measure other people’s reliability.