Relax. At six weeks you're still healing, and all kinds of symptoms can occur. There is no reason to rush getting off PPIs during this stage of healing. I agree that you might have some difficulties if you stopped the PPIs now. Your insides went through a lot--I heard it described as an "egg beater"--and while your outsides are healed and you feel as you should be back to normal, the healing inside has a long way to go.
I was told that most of the healing takes six months, and the remainder a full year. It's way too early for you to assume that your surgery was a failure.
I also had surgery for LPR symptoms--mainly asthma--and know it's a trickier fix. Surgeons generally only expect to get their patients to a "normal" (>14.7 DeMeester) reflux level. This is great for people with traditional GERD. They've got DeMeesters that are ridiculously high, and a "normal" score fixes them right up.
Those of us with LPR can react negatively to a "normal" score, which is why surgeons are less anxious to recommend Nissens to us. That said, many with LPR find improvement after surgery. It does take time. The healing needs to be complete, so that reflux control is maximized. The wrap can leak if it is swollen or misshapen, and healing can take some time.
Also, there can be a reflux of food and liquid that doesn't make it through a tight, even slightly swollen wrap, that can cause irritation.
Try to think positively. Give your body a chance to heal in its own time. If you can surrender to the healing process, and let it lead you where it wants to go, you'll find it easier to tolerate. Try not to get frustrated that it isn't improving more quickly. Your frustration won't do anything to speed healing, and it will certainly make it more difficult to tolerate your wait!
I'm glad you've joined us at the forum. We've got quite a contingent of Scandinavians, don't we! Hang in there...things will get better.