tbh, I don't believe it does any of the things you're claiming it does. Especially some moral play you sneaked in there about devaluing human life. Because "taking care of anyone but yourself" and "giving a damn about anyone else" is quite like stating that their life is valueless.
The quality isn't going to lower to anything less than what it is, however I do fear that it may not increase at as fast of a rate. But that's a fair trade-off, in my opinion.
"Decreases availability"? In what sense? Waiting rooms in countries with socialized health care are no longer than waiting rooms here.
Whether or not there are less doctors is dependent on whether or not their pay will be altered, which is dependent on the system itself - not all socialized systems result in less pay.
The taxes issue has already been addressed. The health care reform is being paid for by cut spending in government. Your taxes are already being used to fund other, unnecessary governmental things. Things that aren't being used. i.e. your tax dollars are currently being wasted. The current health care bill simply redirects those tax dollars already being collected to the new health care reform.
And the argument that socialized health care makes medicine about what's cheapest as opposed to what's healthiest is quite the opposite. In a system where what medicine you get is based on how much money you make (i.e. capitalism, the current system), the medicine you get is based on cost, not health. In a system where anyone can get any medicine, the doctor can prescribe what's best for the patient regardless of the price of the medication.
Remove doctor-patient confidentiality? Probably. I'm not sure of the specifics on this in the current bill, but it would certainly be optional. If your confidentiality is more important than free treatment, you can surely pay without the public option and keep your herpes outbreak to yourself. Not that there would be any difference in doctor-patient confidentiality that doesn't already exist among private insurance companies. "I don't want the government knowing about my medical problems. But this private company can!"

You give the minors health care at the cost of the old.
We give minors education at the cost of the old. Are you saying that's a bad thing?