I'm sorry to hear this and I hope that your other program works out!
I applied twice...last time I had zero interviews and was rejected from all 4 schools. I spent months talking to, I kid you not, 52 professors across 9 of the 11 schools (2 schools' professors just never replied to any of my emails ever) I applied to in the Fall to really gauge schools/departments, fit, and research interest and ability. An MPH mentor I still am in touch with recommended this was the biggest thing lacking from my first round and this time - it did the trick.
Also what @MCH_Hopeful_2021said - this year was INSANE. All the cards had to line up just so in order for anything to work out. I don't think age should be a factor - if you want to do this, you should totally do this! If anything, your depth and breadth of experience is going to make you an amazing addition to any program. If giving up your dream makes you sad, you shouldn't give up your dream - so hoping for the absolute best outcome for you this year! And if this year's not the year, then I'm so hopeful and confident for you that next year will be