I’ll respond to your survey although it’s probably better in the general UC forum:
DS1: applied to 5 UCs in 2014, accepted to 1 (chose a uni in the UK);
DS2: applied to 4 UCs in 2016, accepted to 2 (chose Cal Poly SLO);
DS3: applied to 0 UCs in 2020, (chose Chico State);
DD4: applied to 7 UCs in 2022, accepted to 2 so far.