Never tried writing aids, doesn't Grammarly make every output sound like a corporate press release or HR speak?
It has style aids and allows you to set tone goals. It's not an automated tool which just processes and gives out a "fixed" version.
It gives you suggestions, and marks your errors. It's up to you to decide which ones to add, which ones to ignore.
I generally use its punctual help, and want to see its suggestions about my sentence structure and flow, since English is not my native language.
Also, I use its advice on different levels depending on the recipient of the text I'm writing, plus the length of the text itself.
Other than that, in normal conversations, these mistakes are part of our personal identity if you ask me.