Brush Library - Any of these brushes causes program to slow way down

So animate works fine when I'm using any other tool. It's only when I go to use the artistic brushes in the brush library that I have issues. I can draw maybe 3 or 4 lines using one of these textured brushes and animate gets bogged down incredibly bad and animate is virtually unusable at this point. I want to be able to use these brushes to give everything more depth but it won't let me. I'm using a MacBook Pro mid 2015 model with a 2.8 GHz quad core i7, 16gb of ram, and an AMD Radeon R9 M370X 2gb graphics card. Animate's version is 21.0.1. Please help!!! Thanks!