What didn't you like? I've got three bikes with 11 speed and they all shift as well as anything I've ever ridden. None of them required a single adjustment after the cables seated in during the first few rides. That's normal with any cabled system. Two of my bikes don't even have frame mounted cable tension adjustment.

Some people have been unable to fix their cable friction issues, and others don't even know they have it. They just keep changing the tension adjustment in an attempt to fix the problem. That approach will never work. The best thing to do is start all over with new a new cable and housing on the right side. I would try Shimano or Yokozuna housing with a Campy cable. I also recommend the behind the bar routing, not the front. Make the housing lengths generous. I increased the rear loop so it's a least an inch longer than the Campy precut housing.