i go to sally's beauty supply and get the knockoff brand (basically what's in the little expensive bottle but in a big white bottle and no brand labeling) for hella cheap. i smell delicious all day and my beard is lush and smooth

I got some weird dry skin/dandruff/oily scalp issue combo. Things that I have found working over a very long time struggling:

• Out of all shampoos Head and shoulders actually has the best effect. Anything else not-specialized doesn't. Ketozonol/Nizoral does help but I am not feeling much better over HnS. And these are not suppsoed to be used long term.
• I have tried SLES shampoo from Neutrogena. Didnt work for me like at all.
• Water hardness is super important. My hometown had much softer water that allowed me to not to wash my head for a week and it would be fine. My current location has fucking insane hardness and I have to wash my head each 2-4 days or it starts to itch very badly. Whenever I travel, some of the time my hair feels great and I suspect that water hardness in the hotel might be much lower than at home. Maybe look into installing some kind of filter. If you live in a house, 100% invest in reverse osmosis filter at least for your bath/shower.
• My head also gets oily quick. I usually wash with 3 shampoos. 1st shampoo - cheap 1 euro shampoo that I use just to wash majority of oil off. 2nd shampoo - deep cleaning shampoo that is also cheap - 2.50eur but it does have an effect. 3rd is HnS. The longer I soak hair with 2nd and 3rd shampoos, the better it feels afterwards.
• Adding up to soaking point: if I take bath I soap my head quick, and each shampoo soaks my scalp for 20 minutes or so. This way head feels much nicer over the next days. In shower, 2-5 mitnues or so.
• adding up on deep cleaning shampoo: I found a few shampoos that claim they are deep cleaning/cleansing. But upon trying, only one felt effective. If you seek for these shampoos, try more options til you find something that works.
• Conditioners have no effect to me. I have heard that it might help in certain cases, so maybe you should try that too.

I really do hope you will find a solution to your problem. This shit sucks donkey balls and is so annoying to live with.

Check what the active ingredient is, then find that cheap

Nizoral didn't work?

Hibiscus leaves, flowers and egg white from one egg (little bit coconut oil is optional). Blend them in a blender, leather all over your hair and scalp, leave it for 30 to 40 minutes and wash with water (don't use shampoo). Do it once a week.

You might have scalp psoriasis. I always thought I just had bad dandruff and tried shampoo and leave in treatments and they didn't really work. I got it checked and it's actually just psoriasis (plus regular dandruff too, but the dandruff was exponentially worse because of my psoriasis). You could maybe get a dermatologist to prescribe a topical steroid. It helped for my case (you might still need a dandruff shampoo to go along with it)

silly question, what is wrong with having dandruff?