That is a fair point, but a lot of times hes right, unless it involves Goku. He really was stronger than imperfect cell, and I think he really was slightly stronger than Trunks. It makes sense because hes more driven than Trunks, and trains harder than Trunks. Naturally hed come out of the time chamber stronger. I like Trunks character a lot but it has to be said, especially at this point in the story, hes both inexperienced and naive. He isnt the warrior that Vegeta is, and he doesnt have a strategic grasp on battle prowess yet.