Ex-Green Bay star Nick Collins says the Lions have nobody to blame but themselves -- not even garbage refs -- for their loss to the Packers ... telling TMZ Sports Detroit just blew it!!!
"They had so many opportunities to win that game," Collins says.
If you missed it ... the refs on "Monday Night Football" were as bad as they've been all season -- throwing flags for two questionable illegal hands to the face fouls that helped lift the Packers to a win.
But, Collins -- who admits the calls were trash -- says despite those penalties the Lions still had every opportunity to take control of the NFC North .