I believe there are some threads here about what to do about hard water. You might try doing a search on that. I wish I could give you more help. The only other thing I can suggest (after you figure out the hard water problem) is to keep a little journal and do one thing at a time. Use 1 conditioner and 1 creme and report the results. Check the frizz forecast on this website and right it down next to the date. Then the next time you do something to your hair, change something, again write down the frizz forecast and see if the change makes it better or worse.

Try that and post again. I hope you begin to make progress.
2/c and some 3A.
Protein sensitive but can use occasionally
Highly porous. Color over grey.
Best 1st day method: Super Soaker
Stylers: Mix Curls in a Bottle into everything for shine. Terrible pj
Sometimes try roller sets - classic glamor but I prefer my curls.
Every day is a gift