No one likes to be criticized or told that they are doing a terrible job. It is a no brainer that people respond better to positive feedback or when they are told "thank you".
I have been thinking about how I have complained or criticized certain companies for not providing a good service or product, especially when it comes to providing services for the deaf and hard of hearing population. However, when they actually did listen to my concerns and tried to help me, I always remember to thank them. I think this is so important. The more positive feedback and "thank yous" companies get about the services they provide to the deaf and hard of hearing population, the more likely they will use them again or be encouraged to find other ways they can serve them.
Think about the times you have received a thank you letter or had someone tell you "thank you" (not the perfunctory ones). Think about how it made you feel.
A long time ago, I received a hand written "Thank You" note from a parent. I was impressed. I could not believe that they took the time to write me a hand written thank you note. It made me realized how much I helped them by giving them unbiased information about language acquisition and using sign language with their infant. Because of this, I was encouraged to work harder in supporting this family and their child.
When I was criticized repeatedly and not provided any positive feedback or suggestions, I became discouraged and wanted to stop.
If there is a company or person who were able to help you in some way, don't forget to thank them!