There's no point in being mad about this.

Crypto isn't for the weak. You signed up for this. If you didn't expect this, leave the space. Losses will happen. It's normal.

What you learn from things like this is who should you trust. There's nothing wrong in people taking profit or clipping their bags. They're going to at some point. But being used as exit, is straight up wrong. And if the people around you are using you as exit, then you need to leave those people. There are only a number of people you can actually trust so you need to be careful with who you trust.