I was going to list them individually but pretty much all of those points are covered by my point 2.Then you clearly haven't bothered reading it very well.
The 'accusations (read facts)' are:
1. Johnson missed 5 cobra meetings.
2. Emergency stockpiles of PPE had dwindled and were out of date (I’ve seen this multiple times, with us being sent masks which expired in 2016 and with a fresh sticker put on top by the Government).
3. No training to prepare key workers for pandemics, in part due to our preparation for an 'Oven ready Brexit’.
4. Little effort to acquire PPE, ventilators even once the scale of the crisis had started to become apparent.
5. Even if you've decided to convince yourself that Ferguson is a quack who doesn't know what he's doing, he is not some stand alone individual as you seem keen to try to portray. The article listed at least 3 other teams, from 3 other institutions, who did their own modelling and estimates and came to similar conclusions, many of them before him too. He is not out of line with what other scientists were saying.
6. We were one of the 1st countries to develop a test for the virus and yet didn’t bother scaling up production at all. Despite our abundance of private labs and our frankly huge amount of specifically level 4 biosecurity labs to help process it (for reference, we have 9, the USA have 13, China have 1-2, Germany have 4, France 2, Australia 3, Canada 1).
7. The head of the British in vitro diagnostics association, making up most of the UK testing sector, was not approached for help from the UK government until 1st April- the night before the Govt stated their aim of 100k tests a day.
8. I’ve already mentioned the 2016 pandemic planning and lack of action from that. You've got your head stuck in the sand about that one though so we'll move on.
9. What pandemic plans we did have were not implemented in February anyway.
10. NHSE declared this its first level 4 critical incident, yet there was a failure to replenish PPE from that point.
11. The British Healthcare Trades Association (BHTA) was ready to help supply PPE in February — and throughout March — but it was only on April 1 that its offer of help was accepted. Dr Simon Festing, the organisation’s chief executive, said: “Orders undoubtedly went overseas instead of to the NHS because of the missed opportunities in the procurement process.”
12. The UK government's own analysis does not agree with you that this is a very low risk, reasonably low outcome risk:
And just for an added extra:
https://www.ft.com/content/5f393d77-8e5b-4a85-b647-416efbc575ec
Muddled thinking punctures plan for British ventilator
Evidently the government didn't believe the cost to be particularly high either as they didn't do anything.
Regarding Ferguson; he's not a quack, he just appears to have a habit of getting somewhat hyperbolic in his predictions. That's the logical end result of teams of epidemiologists who only work with other epidemiologists - same in all fields. If you look at the video I posted yesterday, there's a valid argument that you don't kill an economy over untested theory.