Why don't people like the Emoji Movie?

I'm actually curious. I hear lots of hate about it but personally I loved it and still am fond of it.

My backstory: I watched the movie in my sophomore year of high school. I was especially caught up in the scene where the boy wants to ask the girl out to prom. Then I had my first high school crush immediately after and from the movie I learned basic dating advice such as just be yourself and not worry about rejection. As far as the crush went, we just ended up as friends. I don't keep in contact with her anymore but I still think about the legacy that movie had on my social development all the time.