Well, I paid $20 to walk 18 yesterday and had a great time. $50 green fees are not in my bag. However, I'd drop the money to play/stay at a iconic course like Pebble, and I would expect to have a knowledgeable caddy, friendly staff everywhere, and would be ready to pay out a bundle in tips. Wouldn't mind waiting to hit though. I'd want a slower round so I could look at things. A TPC track in Texas doesn't get my attention.
Nonetheless, unless they were rude to you, which doesn't sound like it happened, you're just another victim of slow play.
Looking at their tee time reservation page, they appear to have a 10 minute interval. The trouble must be, when someone in front of you pays $300 for a round, he doesn't want to hear that he cannot hit his 160 yard drive from the tips. So he flips it into the rough, and that holds up everyone, members, hotel guests, and walk-ons.
I also see that their website will sell a tee time at full price at 6:55PM, even though the sun sets at 8PM today. I hope that's a programmers oversight.