Hi, with all due respect

Giving 1-star without giving any feedback or comment for improvement will not give you any benefit.
In fact, it will only be degrading designers, and make them less motivated to work on the design.
Please remember that 99% of designers here giving their time and working for you freely.
So, please be more considerate.
If you don't like the designs, please just eliminate them.
No need to give them 1-star. That action will only demotivate designers.

Once again, please be more considerate.