"Victim blaming" is actually kinda ideal. It's been the Democrats MO for why not to self-evaluate for going on two decades now since the party imploded in 1994. "What's the Matter with Kansas?" "Messaging failure" and all the other reasons Democrats lose that have nothing to do with Democrats but are other people's fault for bringing it up.
Anyway I don't get blaming Stein voters. Gary Johnson presumably shaved a lot more votes off Trump than whatever Hillary lost to Stein. The third party situation probably benefited the Dems this time around.
We have to factor in that it also is by state. Johnson and Stein getting 10% of the vote combined in California or something isn't going to swing it but will boost their national totals.
From the toss-up states:
Wisconsin: Trump (47.2%), Clinton (46.5%), Johnson (3.6%), Stein (1.0%), Castle (0.4%), McMullin (0.4%) (Trump+Castle+McMullin (48.0%), Clinton+Stein (47.5%))
Michigan: Trump (47.5%), Clinton (47.3%), Johnson (3.6%), Stein (1.1%), Castle (0.3%), McMullin (0.2%) (Trump+Castle+McMullin (48.0%), Clinton+Stein (48.4%))
Pennsylvania: Trump (48.9%), Clinton (47.9%), Johnson (2.4%), Stein (0.8%), Castle (0.4%) (Trump+Castle+McMullin (49.3%), Clinton+Stein (48.7%))
Florida: Trump (49.0%), Clinton (47.8%), Johnson (2.2%), Stein (0.7%), Castle (0.2%) (Trump+Castle+McMullin (49.2%), Clinton+Stein (48.5%))
Arizona: Trump (49.0%), Clinton (45.5%), Johnson (4.2%), Stein (1.3%) (Trump+Castle+McMullin (49.0%), Clinton+Stein (46.8%))
North Carolina: Trump (49.8%), Clinton (46.2%), Johnson (2.7%), Stein-as-write-in (0.3%) (Trump+Castle+McMullin (49.8%), Clinton+Stein (46.5%))
Virginia: Clinton (49.8%), Trump (44.4%), Johnson (3.0%), Stein (1.4%), McMullin (0.7%) (Clinton+Stein (51.2%), Trump+Castle+McMullin (45.1%))
New Hampshire: Clinton (47.6%), Trump (47.3%), Johnson (4.1%), Stein (0.9%), Sanders-as-write-in (0.6%), Kasich-as-write-in (0.2%), McMullin-as-write-in (0.2%), Pence-as-write-in (0.1%) (Clinton+Stein+Sanders (49.1%), Trump+Castle+McMullin+Pence+Kasich (47.8%))
It's borderline impossible to make this third-party swing factor case unless that Comey letter truly was magic that led to misleading people into voting for Gary Johnson.
EDIT: Added tossing non Johnson votes to their likely candidates. One state then depends on GJ voters to reverse it back, Michigan. A state Clinton blew despite 20 point leads in the primary.