How can it be rubbish if he becomes nervous?doesnt that make him vulnerable and weak in that aspect?
Beating a player in a few times with backhand doesnt make him better.
Ive never seen Ma Long smash with his backhand,but ive seen Zhang Jike do it.Ma long only topspins,blocks or chops with bh.
You cant compare them to Wang Hao,cos he holds his bat completely different.
Well you can't say that his backhand is nothing compared to ZJK's because technically it isn't.
When he is confident and plays his best he is on par with anyone in the world.
When he isn't he receives serves badly and steps around too much (see his match agains Wang Hao in Paris 2013 at WTTC).
You can't generalize that his backhand is bad as well as you can't generalize who is better player, him or ZJK. You can only say who has had more success.
P.S. Why on earth is it important to smash the ball with he backhand? It is played practically once in a tournament, and if you have time to smash with the backhand, than there is certainly enough time for Ma Long to step around and finish the point with the forehand.