The Treadstone Resurrection

This book started really interesting but then fell back in to the generic spy tropes.
Corrupt government group needs to take out our own agents.
Retired agent gets pulled back in.
Retired agent while being hunted by government kill teams, freely takes private jets everywhere, has access to money, his old contacts, weapons but the hunters have no clue.
The hero tracks down bad guy via Instagram. Yes Instagram..
Lots of new characters who only provide a plot point then the disappear or die.
Over the top action that goes on way too longer than necessary.
This has nothing to do with Bourne series except they say Treadstone a few times, flash backs of extensive training and taking pills.