The target weight I assume is a guide to whether you are doing lots of things correctly , sticking to the dietary guidelines, resting and sleep , sticking to training regime etc. and would be one indication and measure to how you are likely to perform and how seriously you are taking your job. Think it won't just have been the weight Pep will have had an issue with and this combined with returning late , maybe not being able to grasp messages in training most likely led to Pep wanting to give him a kick up the backside with the weight remark. Rather than it firing him up it looks to have pushed him back into his shell and upset his mum. Like you say he has failed to reach the bar required and we move on as does he but sounds a little weak in character based on that interview.