I think some people find it comforting to attribute as much as possible to human error, rather than simply acknowledge that this is a shit situation nature has thrown at us.
So the 'if only the government had done X,Y, Z' and 'if only people weren't so selfish' is a way of deflecting from the fact that life is sometimes utterly shit.
That's not to say the UK didn't clearly make mistakes in their response, of course they did. But some very important things were well handled (the vaccine task force, the rollout) and there's a mindset among certain posters on here that simply won't acknowledge this.
There were SO many variables impacting how countries were affected and how they handled it. Geographical, cultural, legal, societal, impact of past infection, the state of various health services, general health of the nation, past experiences with China, age of population, incidence of co-morbidities in population, extent of planning for events like these, pharmaceutical presence, timings of infection. I could go on and on.
So yes, I'd like to see a global enquiry, but it would have to take into account all these factors. There absolutely wasn't a one size fits all approach to handling Covid and ultimately better results came from working to individual nations strengths rather than against them.
For example, it probably should have been obvious that given their lack of experience with such systems and the legal barriers in place, European countries would struggle with implementing a decent Track and Trace system, compared to say South Korea.
Equally, vaccine development and rollout is something that countries like the UK were well positioned to do. And they did that.
The picture is very complicated and changed across all stages of the pandemic. Almost every country struggled at various points.