You're right. Though we can tell you didn't compose your comment in Hemingway. It characterizes one of your sentences as "hard to read," and another as "very hard to read."
It's so funny. Looks like our brains are evolving towards monkey. Or we should start from our first literature class and let teacher to emphasis on the effective expression skill on top of grammar.
Sometimes I saw very good comments which are very long but informative. It takes us time to compose and read, but that's more valuable than short sentences.
