Let me explain my thoughts.
BT are doing an incredibly bad job IMO of operating a critical infrastructure IMO (not rolling out broadband universally, removing tools from ISPs to allow them to perform proper diagnostics, I could go on) ....
I do tend to agree with your comment about the removal of diagnostic tools and other useful information, but both of those could be solved by a stronger mandate for OfCom from the government.
I also think Openreach would be better fully independent of BT Group. That is not the same thing as nationalisation.
For heavens sake man! The politicians, by definition, directly control nationalised enterprises. They don't even understand what the current problems are, never mind present an inviting prospect as the management of the system. For example, look at the state of the road system!
Additionally, "the infrastructure" includes an awful lot of BT Wholesale kit and facilities. Does that get nationalised as well, so then be far more cosily in bed with Openreach than it is now? At the moment there is at least a "Chinese Wall".
My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost.
Internet connection - IDNet Home Starter Fibre.
Live BQM.
"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.