I had the same issue but not as bad as yours. Have a read through this https://www.ftypeforums.co.uk/viewtopic.php?t=6232
If I was to do the job again, I'd first secure the black rubber behind the chrome trim to the bodywork and then the chrome trim to the black rubber.
It's also worth having a read through this topic https://www.ftypeforums.co.uk/viewtopic.php?t=6957