As far as I am aware, you are the only person who thinks that the housing shortage is the most major issue facing the UK government, so it's not really surprising that none of the major parties care to do anything about it.
The Brexit clusterfuck hasn't progressed at all since the referendum, and that's one of the reasons why May has lost her party's commons majority, rather than increasing it as she anticipated when she called a snap election.
With luck, a minority Tory government under a new leader will be forced to back away from May's insane idea that "no deal is better than a bad deal", and will get their finger out and start trying to limit the inevitable damage from this crazy policy - ideally, the new government will withdraw the Article 50 declaration completely, and hold a new referendum, to find out what the actual "will of the people" is, now that they understand that Boris and Nigel were lying about spending 350 million on the NHS.
Most of what you say I agree with where in brief May has a history of uselessness. May has so far done nothing on BREXIT and the EU leaders need to be a bit more adult about this.
Housing is a fundamental issue for those families packed into small flats, where young people and old people are turned away by councils even though they are supposed to find temporary places.
There is no point in driving people into Britain from abroad without new places for them to live in.
We will have more money to spend on the NHS after BREXIT, but given the Tory record it wont be spent on the NHS but simply vanish as cuts continue.
Building affordable housing will create jobs and provide a return in the future. Most police and nurses who work in London have moved out as rents are unaffordable.
Someone on £30,000 per year could not afford £3,000 per month in Central London for a one bedroom flat or pack into shared accommodation for around £1,500.00
The Public Debt is around £1.7 trillion most of it in high mortgages due to high house prices. The National Debt is also high. A few EU members had to be bailed out, but in the UK since we joined the EU we had to bale out institutions such as Lloyds, the Royal Bank of Scotland, the Cooperative Bank all of which ran for hundreds of years. In addition the Midland Bank was taken over by the HSBC
If we have another referendum and they vote to leave what then? All parties recognise it won't take 2 years especially when the process has not started and there are complex issues to guarantee the welfare of hundreds of thousands of EU citizens living in the UK and the far smaller amount of UK citizens living in Europe.