I don't know what you want from me. It's just an impression I (and plenty of others) have of him. He doesn't look as quick or as lithe in his movements to me, and when I look at him stood next to other players, I do think he looks a bit too bulky for a footballer's ideal body type.
It's really very, very simple.
You are calling him bulky. I am asking you which part of him looks bulky to you because I see absolutely no potentially restrictive muscle mass on his body. He is tall, he is lean, he is (IMO) no way bulky.
At 6"2 and a natural athlete, he is always going to look bigger than a scrawny little pussy like Coutinho or someone of that ilk.