In article ,
says...
Get it out and replace with a Trumpet Vine. In 2 years you will wish you'd
stayed with what you have!!

Oh, I have those, too. One almost as thick as my wrist climbs the
big burr oak in the front yard. They seem more content to stay
where put - at least in NW OH.

I have them, also, but they're not even close to the Bittersweet when it comes
to invasiveness. I must also add another one to the nominations. I'm not sure
of the exact name. Mom calls it a Cinnamon Bush, but I refer to it as a Spice
Bush.
Sue in Mi. (zone 5)