If trying to get enough public support to push for structural change is the idea, then iOS is currently moving toward being less locked down, while Android has been getting more locked down.
Help change that by supporting open platforms over closed platforms. It's that simple. Put your money towards fairphones and pinephones and not iphones.
I will put up with a certain amount of jank to support better platforms, but those two in particular are a mess and the fairphone is still stuck on qualcomm.
If trying to get enough public support to push for structural change is the idea, then iOS is currently moving toward being less locked down, while Android has been getting more locked down.