The Super anime made me dislike Trunks as a character, and I used to think he was one of the best characters in the original manga. He was just so weird in the anime. His plot-induced rage boosts were maddening, all just to keep him in line with the gods. It probably wouldn't have been as bad if Zamasu wasn't haxxed to keep up with Super Saiyan Blue because then you could've just used Trunks to keep him at bay, but he was, thus Trunks had to be relevant. I don't exactly care for the manga's way of excluding him in his own arc thus far, but at least his power has been reigned in fairly well (and Zamasu's) and he's not fighting on par with Goku and Vegeta, which would be just downright retarded. I'm sure Trunks will have more to do in chapter 23 onward, but I'm sure it can't be any worse than the Genki-Dama Sword or him outperforming motherfucking Vegetto before the sword even came into play; that set a precedent for pure seizure-inducing ejaculatory mind rape, I tell ya.
But yeah, Super Trunks is just trash anime-wise. He's much more tolerable in the manga, but that's also because he hasn't done anything and he hasn't gotten his Super Saiyan Rage form.