I can relate to parts of this, GS - but only parts.
I can hear your distress about why there is no one HELPING, too. (I can relate to that one too)
And I can hear exhaustion and frustration; overwhelmingly.
I wonder, how old your father is? Do the folks who are currently treating him have his full medical records (including the psych)? Have you been able to connect to or talk to, any of the nurses? Sometimes they understand and are more forthcoming with helpful information than the doctors are.
I know the reality of multiple medications - and the cascade of dominos falling that happens when one thing goes out of balance, in an older person. In light of that, sometimes it's better to "start over" - to remove all the medication, establish a new baseline of need, and then slowly re-introduce things based on need and priority. Yes, you're absolutely right to be concerned about this approach - but I would guess that he's being as constantly monitored as his mental state will allow - by the folks who can act quickly, if needed.
I also know how the patient himself can sabotage, thwart, and prevent the people tasked with caring for him from delivering that care. My Dad was evil to his home health aides (we had to pay extra "battle pay" for the people who had to deal with him); he had to be restrained so that he wouldn't pull tubes out (which he did every chance he got). He even decked a nurse he didn't like. It seemed to be intentional, on his part. And if I'd been there, I already knew that there was nothing I could do, to influence him to be "good". I couldn't control him - through any logic, persuasion, or pleading. All I could do was take care of myself - and brace myself for the next episode.
I was impressed with the tone, in what you wrote. You're in "tiger" mode. And you seem absolutely clear on what you want; what outcome you want for your father. I sympathize with you on the idiocy of the bureaucracies and roadblocks and stalling that you're experiencing, in pursuit of that outcome. Are you in a legal position to implement and authorize care?
Having just gone through something that involved serious medical care for MIL - the questions we needed to answer were: does he have a Power of Attorney - and yes, there is a separate POA for health decisions. Does he have a living will and health directive? We
discovered that without these, there wasn't much information at all being provided to us - in fact, it was almost exclusively the other way around - we were asked to provide information, over & over again.
The hardest thing of all - which I know you know - is the long wait without any information from doctors about a.) what's going on and b.) what can they do, will they do. I think we all have unrealistic expectations about how fast the medical system can accurately diagnose and prescribe or treat people, in all cases. Multiple medications just makes that more difficult, because of potential interactions between the medications and individual pharmaceutical side effects.
So, the doctors & nurses tend to do nothing except stabilize a patient, until they are absolutely sure they know what to do - and that it won't just make things worse. And even that has a negative side effect - on those who care, like you GS...
... my advice? Make SURE you are taking care of yourself and your son. If there's nothing to, except to "be there" with your dad... then by all means, go home - make a cuppa tea - take a nap. Schedule daily visits if you want - but make sure you're also taking care of you. It sounds like it's going to take some time for the doctors to gather all the info they want, before they start to talk about what's going on, and where to go from there. And they are listening to you, GS... that's still important information to them - but they've got to confirm it, themselves.