Dude, paragraphs are your friend.
Whether other people have committed a crime or not is immaterial to your fathers cases. Most of us have not committed serious drug-related felonies. You paint your father as an upstanding citizen but that is disingenuous. The upstanding, hard working do not participate in the drug trade. All your ranting about the inequities of sentencing, etc... mean nothing. The fact that other participants turned states evidence ahead of your father, doesn't mean anything either. There's no requirement for an equitable distribution of punishments among all the criminals in a given enterprise. Fairness doesn't mean he won't serve more time than others, just that he serves a time commensurate with the crime he is apparently willing to admit under oath that he committed.
You've not really provided any substantive details here of the charges against him other than ranting about how you don't feel it's fair. 5 year per count is NOT an unexpected sentence. Absent being able to get him better counsel there's not much you can do. Asking for better public defense might be an option, but there doesn't appear anything at the face of it to indicate that what the current PD is doing is incorrect.

