Stagnation is way different then reduction, I’d also be fine with that, as i suspect would be other home owners.

Tank “to suffer rapid decline, failure, or collapse” is different from stagnate. The OP said:

In all seriousness, all levels of government are moving too slowly on housing affordability. They should be trying to reduce prices to prepandemic levels, or, even better 2010 levels.

This jives with tank, but not with stagnate.