Without watching it myself, what about the cavalier attitude made you angry? Some people are more chill than others, I know of a guy that put an L-5 into a lake after an engine failure on takeoff and I'm not sure I'd hold it against a pilot who walked away from it. Maybe they're just chill people.
Spoiler Alert
The pilot and his girlfriend wanted to run away from home.I believe they were teenagers. He cooks up a scheme to rent a Cessna 150, ditch it in a lake, then run away. I assume what he was trying to do was to make everyone think that they were dead. So, here we have problem #1 that I have with him, he essentially stole the airplane. Problem #2, ditching a light airplane has about a 12 percent fatality rate. He probably didn't know that, this was long before the internet and those statistics weren't widely available back then. Taking a passenger on such a flight is absurdly dangerous. They do take off, fly for a while, then he ditches the airplane. He survives the ditching, his girlfriend is unable to exit the airplane and drowns. Curiously, he was able to get the duffel bag he had packed with clothing and money, but could not get his girlfriend out.
After the ditching, he appears on the lake shore, gets himself together, and disappears. The residents of that area notice oil on the lake surface, and a search for the source ensues. A sonar device finds the airplane, it is brought to the shore with the girlfriends corpse still in it. A search for him isn't successful and he assumes a new identity, and goes on with his life for many years.under his new identity. He starts dating a woman, who catches him in a lie, finds out who he actually, is and he is apprehended.
When brought to trial, he claims that her seat belt jammed. He asserts that his girlfriend was 100 percent in agreement with this plan, and that absolves him of responsibility. He's finally tried, but receives a very short sentence.
He stole an airplane, intentionally ditched it with a passenger aboard, killing said passenger, and showed zero remorse once caught. One of the girl's relatives suggests he is a sociopath, and I can believe that he is.
I typically do a quick search on my phone, skim the wiki article on whatever it is, smile, and leave the room. Because she doesn't want to hear "Bob did it, got 25 years, jury only deliberated for 2 hours" 
