Has anyone else noticed a lot of problematic behavior with dementia?

The more I read here the more and more I see posts relating to dysfunctional behaviors coming from the afflicted. I have not yet been able to do research on this, however in my home (my Father has not had the official diagnosis yet but all the baseline symptoms).

I have seen caregivers bullied, attacked, etc. In my home now it seems to be more of the passive-aggressive BS. So is the Dementia causing this or is it the old age? How do we respond to it all?

I have seen many post responses that recommend placement. I haven't' seen any real strategies to deal with the dysfunctional behaviors and I think there should be.

I have tried ignoring. That usually doesn't' work because he will find something else or he kicks it up a notch to create even more issues.
I am also wondering if Dementia is comorbid with Psychiatric Disorders. I am seeing a lot of symptoms of these in my home. I am also reading a lot about others who see behaviors that mimic Psychiatric Disorders.

I thought it would be a good idea if there were some strategies that we could pool together to help minimize the behaviors. I did it with my oppositional defiant teen and it worked. My Son has ASD and his behaviors are well under control.

It doesn't' feel right to me to just throw up my hands and say I am not dealing with this. I would rather try and solve it. At a minimum I would like to implement some behavioral strategies to reduce the level of dysfunction. I am thinking this could help many who are here.

I wonder sometimes as well if they seem to "enjoy" the dysfunction created. WIth my Dad I offer solutions to problems and he never implements them. I really want to get a handle on this, but sometimes it seems so crazy I have to wonder if it is EVEN POSSIBLE to get a handle on it.