The two main fumbles I can see of note are on housing and immigration.
On immigration the government only made remarkable changes in the last two years, and as if they touched a hot stove, they already realized their mistake and have already scaled back immigration numbers so much that Canada will effectively have nil immigration for the near future. Not likely a generational issue here.
On housing well I agree it'll take a generation to fix it but that was already the case before the Liberals took power. Very much an example of the future is already here but not yet distributed as Toronto and Vancouver were already experiencing a housing crisis in 2014.
Less an issue of what the libs actively did wrong but more an issue of how slow they were to act on the fact that Canada has had bad housing policy since the 1990s and few jurisdictions are taking things seriously. Fed housing policy at this instant is actually pretty good in that it is mirroring and supporting the good BC NDP housing policy. It'll take a long while though for homes to get built and likely things will get worse as the Conservatives scale back on investment.