Let's talk about why studying abroad gets ridiculed.

No, mentioning it just makes me angry. Why is studying abroad always mocked as a "watered-down master's"? Who's so boring to come up with this? Today, a classmate insinuated sarcastically about studying abroad. Our university group is usually quiet, but one day, my best friend told me: "That person says you're spending 💰 studying abroad, and they're still talking about it." I got so mad as soon as I heard it. I've already blocked them, so why are they still secretly gossiping? I don't feel like arguing about it now, but I just want to ask, what should I do when encountering such boring people?