This could be because they understand their frustrations, or it could be you have not been loyal to them thats why they treat you this way.
It will stop hurting soon you will get use too them
Dementia effects the cognitive brain greatly. Symptoms include: mental decline, confusion, disorientation, inability to speak or understand language, and inability to recognize common things effect the patient's abiliy to understand written communication. Mental decline, for example, can make the person unable to read or write. (just add fluff and you're done!)