I've been there. I feel your pain. Especially when the people in question don't hesitate to speak bluntly/inappropriately.. gotta be the adult and not just tell them how it is.
You've shown positive improvement in a few areas but are still below the expected overall level. We will continue to monitor your performance and provide feedback over the next while. We do encourage you sign up for training sessions and courses that can improve your skills.
My version would have been 'Shape up or fuck off' but that's acceptable apparently.