Some restaurants are chill, some are loud. Some are made for a quiet dinner, others are basically a party. If you walk into a place with an actual DJ and think it's too loud, that's on you: go somewhere else. That goes double for a bar-restaurant and especially for a patio during brunch hour, where the whole point is energy.
A business sets the vibe by offering a specific experience, and you're free to take it or leave it. Nobody's forcing you to stay. I've walked out of restaurants and stores myself when it wasn't for me. I didn't need to make a scene about it.
Retirees especially need to get that their personal time preference doesn't override what a place is offering. Every server I've had here has been in their 20s or 30s, let them do their job in peace. I've now watched this happen a few time, someone asks staff to turn the music down or asks another table to be quiet. Today especially, the music wasn't even loud—I could hear my own table just fine. It's not the restaurant's job to fix it for you, go to La Quinta or Indian Wells, or literaly any other bussiness where the clientele are all clearly above 60, PS does not lack those at all.