a lotta cable housing friction after switching handlebars is gumming up shifting

I just got new bars that fit me better, but the routing puts some pretty tight bends in the shift cables which i think is adding a significant amount of friction. You can see in the video that the RD isnt strong enough to pull all the slack out of the cable when shifting to a smaller cog, shifting up is fine. Is there any way i can reduce the cable friction there without getting a different bar? I reused the old cables and housing, but they were working fine before.