Sorry to resurrect a dead thread, but I was having major issues printing a single smooth wall using standard Cura too, and stumbled across this forum. I found a reddit post recommending trying Arachne Cura Beta and I'm happy to report it worked perfectly! Thought I'd post in case other people end up in a similar predicament!
I've included a link to the Arachne Cura and a gallery comparing the results I was getting with standard cura. https://support.ultimaker.com/hc/en-us/articles/360018439500-Ultimaker-Cura-Arachne-engine-beta-version https://imgur.com/a/QBItluR