I'm thinking of giving my instacart delivery guy a 1 star review
Why would you give him a 1 star review?
Because he took too long to bring the shit, I had to wait at the door for ten minutes.
I'm sorry you had a bad experience, but it really isn't fair to the driver. Sometimes unfortunate things happen and they can't get there in time. You might be ruining their day for something they can't control, and leaving a stain on their record.
It's fine to give him a low rating. I'm just standing up for my rights.
It is good to stand up for yourself but doing it this way is hurting the person. He might need the job and your rating could prevent him from making money he needs.