why I am canceling my united mileage plus visa card after I redeem my miles

I am on hold trying to redeem my United miles for a trip to visit my relatives. This is the 7th time I've called. My average hold times have ranged from 30 to 50 minutes. I've reached new levels of stunned annoyance I had never thought possible. And it just keeps getting worse.

1. The Hold Music
It is a one-minute long muzak/classical piece that repeats over and over again. A portion of this piece is frequently used in television commercials. It's not so much the repetition of this song 50 to 70 times in a call that is the problem - it's the abrasive, deafening static that accompanies it. There is nothing quite like a horrible, screeching, static-filled, repetition of the same song that you can't turn on too low of a volume because the intermittent informational recording could be mistaken for the reservations agent to make you feel like an appreciated, loyal customer.

2. The Reservations Agents
I believe I am speaking to a woman in India. In fact, I believe every time I call I am speaking to the same woman in India, or maybe one of two women, because they have the exact same voice, but two different temperaments. One sounds mostly unsympathetic without being bitter, and actually tries hard to help me find a reservation that works, and says you're welcome when I say thank you. The other is totally apathetic, annoyed and embittered at my unreasonable requests to know of any return flight at all in the month of July. There may be other women, and I believe this only because each follows a slightly different process of asking me for the details of my account and reservation options - some asking for my mileage plus number first, some selecting a departing flight before searching for a return flight. They are all trained well to tell me they will be silent while searching for flight options, and to apologize for not being able to meet all of my travel needs.

3. The System
Maybe the problem is not the fact that the reservations agents are in India, or that they neglected to tell me it was possible to place a courtesy hold on a partial reservation until my 5th call, or that she (/they?) sounds annoyed at the horrible misfortune of having to assist a moronic American nimrod like myself in redeeming 75,000 miles.
Maybe it's the fact that researching travel options is impossible on the site (it shows an error message indicating that travel to that airport s not available at all for redemption of miles) and that upon finally reaching a reservation agent, they have no way of checking for any available dates, and instead have to check day by day through multiple airlines for any availability of any kind, and you could be on the phone for 20 minutes looking for return trips when there are none available for two months. Sometimes when I call their system is updating certain airlines, and so they cannot tell me what the availability is, and cannot tell me when it will complete updating. One agent says at midnight the system is updated, another tells me it constantly gets updated. Each time I call, even an hour later, completely different flight options are available. And so it's not hard to imagine why hold times can be over an hour.

I realize trying to book a transatlantic flight 2 months in advance during peak season means maybe I should anticipate some inconvenience. But it's taken me a long time to accumulate 75,000 miles - that was a lot of United flights and dollars spent on the United card. And when flights are $1600+ and I have the miles, it would be stupid of me not to try to use them if I can find anything that works. I've never heard of anyone having an experience like this with Continental. And it's not the Bangalorean ladies I blame either. Somewhere on this side of the Atlantic there are people whose job it is to make a tedious process less painful for the customers it is tasked with serving in order to keep them loyal - which is the whole point of frequent flyer programs. And somewhere, somebody's not doing their job.