Grammarly is very limited in what it allows you stylistically. I tried it for a few months but it didn't let me express all of my thoughts. However muddled and confused, those are my muddled thoughts, damnit.
I never cared for Grammerly and the like. I felt like they wanted to homogenize your voice and often dumb down your language. Google Docs' blue underlines, on the other hand, usually do point to an actual error of some sort.