Earlier quoted context omitted.
I'm sorry but you will have to do more to explain your point on black cab user experience being horrendous. Whilst it can be hard to get a hold of one at times, in my experience of 20 years of using them, the user experience is great - the drivers are typically friendly and get you there as quickly as they can. I have used Uber many times in London and abandoned it months ago, as the drivers don't have the local know…
I've had black cab drivers insist that I can't use my card, and that I must get out. I've had cab drivers refuse to drive me to certain parts of London because it's inconvenient for them. They are also really expensive.
Basically, it comes down to lack of serious customer support and accountability system. Setting new rules from top to bottom in a legacy industry that has decades of industry malpractice under its belt cannot be effective if you aren't able to enforce those rules.