Bad print

Hi,
I’ve been quite happy with my printing quality, until i started printing with support material. The printer behaves well for the entire print; however, the boundary layer between the support material and the actual part is quite low resolution. i was wondering if anyone could tell me how i can improve the quality of the layer between the support material and the actual print.

dropbox.com/s/rav3f4tftrsqu … 5.jpg?dl=0

dropbox.com/s/1dyhhkjcda0ok … 4.jpg?dl=0

Regards