Not sure if you guys read all of it or not. He could no longer come up with good alpha, so started stealing from others by decompiling their code.
I thought a coder's block is being stuck on how to turn ideas into codes but he certainly still has alphas or ideas of his own. That's what I thought. That's why at first he was just curious as how the others were coding it. If he's truly not able to come up with good alphas anymore and the codes that he stole is already obsolete, he's not valuable anymore and should be no threat to UK, why are they still keeping him, wasting UK taxpayer's money? He's a Chinese national; he's not even a UK citizen, so kick him back to the Chinese.
No, I think du Putros is just on a sadistic personal vendetta against him now to try to set an example of him.