@RustyCrab just pure whey concentrate? most brands are gonna be fine, ive used the naked stuff but idk man do your own research.
as for "no sugar" thats complicated. whey concentrate is gonna have lactose in it, thats just how things are. i do hope youre taking it with carbs and fats, otherwise your body wont digest it and you will have terrible shits.

as for my experience, ive had inconsistent tasting batches of whey in the past and got pea protein powder to get some stability in my life, but that stuff tasted even worse. i gave up on teinmaxxxxing and now just drink a lot of milk and eat more lean meats.