I think the problem is structural. This program, whatever its merits, is ran by one of 4 mainstream and God only knows how many other minor 'governing bodies'. If you're not pursuing a WBC title ranking it's of limited relevance to you. If Boxing were serious about this the registration requirements and administration should be through the official bodies, the BBBoC in the UK, the various state licensing (or even better a supervising national organisation) in the US etc. You want a boxing license? You sign up to be available for random testing. A levy on gates and tv revenue funds independent random testing for all. Miss a test? License suspended. etc.
The boxers who makes lots of money can afford performance-enhancing drugs that can only be traced for approx. 3 hours after ingestion. This makes it almost impossible to detect. Has knowledge of a "home boxer" (a really big british star) who tested positive on fight night. The test was just thrown away and nothing happened.
You're comparing a young inexperienced "man" in those sequences Look at how he dealt with Chisora in those early years compared to how Chisora couldn't lay a glove on him in the rematch a few years later in a boxing clinic.
It's strange that a certain former heavyweight champion, (sounds like Anthea Quechua) was known as a knockout artist when they were massively abusing PEDs and lifting a lot of weights, but still got knocked down four times by an obese welterweight who had a burger problem. The good old HGH helps grow your gut, but not your ring IQ unfortunately.