I'm quick to pounce on both-sides-ism, but OP seems to make a clear criticism of the Liberals policy history without venturing there. On several portfolios, they have done pretty good work, but to imply that they can do nothing on housing affordability is disingenuous. The feds used to fund public housing, and they could do it again. They could work directly with municipalities if the provinces object (which they probably wouldn't).

They also regulate mortgage rules. Term lengths, stress tests, capital gains rules, etc. There are plenty of levers they could pull to make it easier for new home owners, and harder for real-estate speculators. They could also provide low interest mortgages, or interest relief, to designated groups.