It's not to be looking for a club that he will be among the first eleven, Sancho needs to fight for it by improving his performance and take his career to the next level. Otherwise, if Juventus sees that he is not playing as expected, they'll put him on the bench and replace him with someone else. Sancho have been moving from one club to another without any improvement to become one of the first choice for these clubs.
Sancho isn't the type of player that "deserves" to play for a role. He is good enough that there are thousands of clubs that will put him playing right away. He just prefers teams where he can play for a role, and try to fight for a place, he could have gone to a worse club and be a star there.
Like we have seen Fenerbahce asked for him but that is causing some sort of trouble and that can't really make that kind of choice if he wants more money, and he just preferred to get here. Chelsea would have been great for him, but he just realized he won't get the first place at all, even if he fought and that team already does well, so he needs to be at a club that will do great thing for his career in the future.