Actually some airports have really stepped up their food game lately. You can find fresh salads and protein bowls almost everywhere now. Maybe it's just about picking better options instead of writing it all off.
Look, even with salads, airport food is way overpriced and often sits out too long. I've had soggy greens more times than I can count. Plus, the protein bowls are tiny for what you pay. You're better off packing a sandwich and saving cash. It's still mostly a scam compared to bringing your own stuff.