Your feelings are exactly what I felt my first 6 weeks. The day after I was home from the hospital and still in pain and couldn't drink but an ounce of Water at a time, I had "buyer remorse". Seems to me, that you weren't right with food before the surgery. It is not a "fix all", it is a tool. I am 7 months out and I am eating regular foods and still losing weight. You will eventually get back to normal, just a slimmer, healthier you. Yeah, there will be foods that you could eat before and not now, but in all honesty, they probaly weren't good for you anyway. I still have my vices, I still eat them (ie; Pringles and spaghetti and coffee), but just a little bit satiates me. I am now 80 pounds lighter and still losing. Hang in there! I PROMISE it does get better.
As for the Proteins, mix it up, combine them, make your own flavors. www.bariatricadvantage.com has A LOT of selections.
The Vitamins are a trial and error. I had to use liquid vitamins up until last month, yeah, they taste nasty, but...I have lost 80 pounds!
Everyone wants to be PC, but, suck it up, you chose to do this, you knew what you were in for before you got the surgery. Nasty vitamins, nasty Protein shakes, not being able to eat "real food" for a months, over eating and puking was covered in your pre op training. You are going to be fine, hang in there.
Danielle