Don't be fooled by the title, the El Camino barely appears in this movie, and it teaches you nothing about the history and operation of the hybrid car-truck.
Instead, we have a lot of flashbacks and added scenes for a show called Breaking Bad which was a popular show about a science teacher like Mr Wizard and his little buddy Jessie.
OK, seriously, it's the final episode that the show gave Walter but didn't give Jessie. But since it's been a few years, it's all bottle episode with only a little new content. In between the flashbacks are Jessie continuing to be very stupid and revisit past haunts. There's brief cameos by people who obviously can't be present.
I call Jessie very stupid, but it's erratic. He'll make a very good decision, a cunning ruse, and then follow it up with completely idiotic unthinking reactions; he can't tell who's a cop and who isn't, can't figure out how much money he has, can't cut and run instead of taking revenge.
And it's slow. The flashback scenes are awful, just misery porn except too slow for me to feel any concern. Jessie wants to be a victim and always puts himself back in that position.
The one heroic, effective scene is then completely implausible, because everything goes right, no hilarious fuckups or bad side-effects. The writer just gave up on who Jessie Pinkman is for this scene.
★★½☆☆ – a whole extra episode of BB. Whoo.