Fwiw, rent control is fully insufficient - what you need is a completely massive supply of affordable housing built, owned and operated by the public. Nothing short of this will make a dent
So problem will never be solved then. Far too much vested interest in the status quo from existing landowners.
Nobody is going to build “affordable housing” unless you like living 10 hours commute from major cities. And as soon as someone builds a bullet train to shorten the commute to an hour the prices will skyrocket.
I'd advise you to avoid defeatism. This is a policy that has historically been implemented in various countries, and it can be done again if pushed for enough from the voting population.
Step one is identifying the correct solution, which we've now established. Step two is to spread the word about it.