People watching Tiktoks on the bus without headphones

I counted it, it's about 5% to 10% of people who do it, which means there is one on almost every bus. I'm sure I'm not the only one who is annoyed by it, but nobody ever has the balls to say anything. Sometimes it's too much and I politely ask people if they have headphones. That often works, but sometimes they say no, ignore me or give me a nasty look. Sometimes they turn off the music, only for someone else to start 40 seconds later...
Also, I always feel like a dick when I ask people to turn it down.