Of course we did. We were running arms out of Libya to fund the "terrorists" in Syria and it all blew up in our faces.
No we weren't running arms in Libya. The Annex was a listening operation to identify Eastern Tribes that would support a return to the Idris Constitution.
Libya was awash in weapons because Gaddafi had been on a two year spending spree.. Before Gaddafi was killed some ISIS had already moved in to Eastern Libya like a temporary sanctuary.
The US couldn't save Gaddafi short of a huge occupation force. The people hated his guts.. All his police, military and body guards were foreign mercenaries.