Frizz Shampoo For Smoothing + Humidity Protection : Used to be the best, but new formula is garbage

This has been my go to shampoo for years. I didn't care about how expensive it was because it lasted forever and worked wonders for my hair. I ordered 2 bottles a few weeks ago and noticed the "new and improved" sticker. After using it several times, I'm done! It's nothing like it was. There's no lather..you have to use a half a bottle to feel like you have covered all your hair. I won't pay what this costs to go through shampoo this fast and it doesn't work anyway. My daughter, who lives at college, also noticed this without me mentioning it at all, saying that her hair has build up at the roots and never feels clean. So why fix something that isn't broke, LP??? We had a good thing going, but looks like it's time to break up after all these years.