I don't find his acting convincing at all law. It's like, I can always tell he is acting / trying to act, but good actors don't give you that impression ga mah.
There was one scene when he was actin ...
Hmm..... maybe 三哥 really pretended to be drunk so he can get close to 鄧萃玟 (in the scene)?
For 學警雄心, I don't feel what you feel wor. I think 三哥 was doing quite good as the cool cop/mantor.
And did you watch "casino wind cloud"? 三哥 act as a cool ceo (cool guy again). And he has a cool face at almost all time. But at the scene when "ah wing" was dying, I really feel his pain and sadness, guilt and regret bor. Don't you think so?
Of course, I don't think he is the best, but not as worse as you described lor. And actually he's much better than many others, even seniors ones. Do you have any bias on him sin?