Looks like the routing is OK, but it looks like a low end coarse inner wire. Next time look for a "die drawn" inner wire.
These are pulled through a die, or rollers to squash them so they'll be smoother on the outside, and are sold under various trademarks such as "slick". They run much smoother through the housings which is important because the RD return spring has very light action, and it takes very little cable friction to foul up the performance of an index system.
BTW- Did you replace both the inner wire and housing? If not you should have, because the housing liners wear pretty quickly causing excess friction.