My brother in law doesn't understand the concept of preventative maintenance. He thinks my vehicles must not be very good because I often am doing something or checking something on them.
He basically just waits for something to break, and then cusses the manufacturer or dealer/mechanic who last worked on it. This guy could tear up an anvil, he's so hard on machinery.
The notion of replacing or correcting something before it completely fails is a foreign concept to him. Another in law blew an engine on a new Honda, which is pretty hard to do, by never changing the oil for like 50,000 miles, or something ridiculous. Of course, she blamed Honda.