Your public speaking skills are horrible. The audience was so bored! Is this an example of constructive or destructive criticism?

Are you this messy at home too! No wonder you can't get anything done at work. Is this an example of constructive or destructive criticism?

If you spent as much time working as you did on the phone, we would get so much done. Is this an example of constructive or destructive criticism?

I know you like to share what you did on the weekend. When we are at work can we share that at lunch and breaks. Is this an example of constructive or destructive criticism?

I noticed you wandering around for 20 minutes after you finished your last job. Please don't waste time like that, come find me and I will find something else for you to do. Is this an example of constructive or destructive criticism?

You are as slow as molasses. Is this an example of constructive or destructive criticism?

I think your presentation could be more visually appealing if you put some pictures in it. Is this an example of constructive or destructive criticism?

You are just not cut out to work here, you should quit. Is this an example of constructive or destructive criticism?

It's impossible to know who handed this in if there is no name on it. Please make sure that you put your name on it next time. Is this constructive criticism?

Wow! I can get 5 shirts folded in the time it takes you to fold 1. Is this an example of constructive or destructive criticism?

You have been late the last 3 times. Is there something going on at home? Is this an example of constructive or destructive criticism?

I think you misunderstood my instructions, let me show you how I want it done. Is this an example of constructive or destructive criticism?