Replying to What is wrong with girls these days.

So I dated this girl who was real nice and chill she decides I'm not the guy, ok fine that's how it goes right? She asks if she can still use my snowboard gear for the rest of the season and I said sure because I would never want to deprive anyone of shredding the spring slush.
Months after the season ends still no snowboard I try texting her finally called her and I was blocked. She didn't want to give my stuff back and I ended up having to talk to her dad (we are still good friends) and I'm like hey I think your daughter is trying to steal my stuff do ya mind telling her to give it back. Anyway I get it back thanks to her dad I just don't understand how you could switch from a gf to a theif has this happened to anyone else?