It is hard to be brief but:
* Financial services - totally fucked, most of the VC funding in the UK comes from overseas investors because pension and insurance rules (that were largely adopted from Europe) mean that they have to own large amounts of govt bonds...the recent problems indicate how wise that was. Everything isn't working: retail, savings, banks, it is all not working.
* Planning - obviously...lots of countries have versions of this problem but it is becoming very problematic. Iirc, there was a recent infrastructure project that had to do a new environmental assessment (costing tens of millions) for every km of work they did...it isn't just housing, it is everything, it is all fucked.
* Healthcare - obviously...not going to say anything more but it is at the point where it is impacting the economy.
* Labour - again...do I need to say more? Look at what is happening right now.
* Education - again...do I need to say more? We have massive issues producing people with skills that employers require. There are other issues around this that relate to poor management and immigration, but schools are just bad (this is mentioned in the article to be fair but only from the perspective of too many politicians being from Eton...why can't they just...find people from journalism, who work at...the Economist say?).
* Housing - separate from just planning, there are specific rules within the housing market that cause distortions above the planning system failing to produce enough supply. For example, rent controls in Scotland...that caused a 40% drop in rental supply in two weeks, this is economic mismanagement on a grand scale.
* Local govt - needs fundamental reforms in multiple areas. Social care, planning, a lot of the new environmental rules are very dangerous (if people from outside the UK can believe it, some local councils are introducing rules which mean you will be fined if you exit your neighbourhood in a car to go to another part of the same city).
* Transport - almost everything isn't working properly. Road, rail, it is all gone. Almost all due to problems in other areas above but which will now require structural changes.
Btw, I don't know what planet you have to live on not to notice this stuff. I am in my mid-30s, every single job I have had things that impacted my ability to produce more output because of govt intervention. Every one. Once you see this stuff, you realise how bad it has become, every level of govt, every institution, it is everywhere.