I’m sorry you’re doing badly, but the reality is that you do NOT need to be buying the “very best”, you do NOT need to be buying Organic, you do NOT need to overload on supplements unless you actually have a deficiency in something you can’t correct with diet. Many people go into this way of eating with a very warped idea (thank the internet) of how it “MUST” be done, and that’s bullshit!
The lethargy is telling is very simply you’re not powering your body correctly. We could very easily help with that, but without a detailed diet of what you’ve been doing, what your current stats are, physical activity level etc it’s impossible to guess.
What I’d recommend rather than just giving up is rethinking why you wanted to eat this way? I feel it’s a safe assumption for fat loss, look better, feel better, have better energy, and most importantly be healthier. That’s all still 100% possible. I’d also remind yourself that the “other” aka “normal” way of eating clearly didn’t work, that’s FACT. This way of eating does NOT bankrupt you! Yes, there are super food snobs out there that have the old Paleo thoughts of everything Organic, Grass Fed, pastured, blah blah blah. That’s all well and dandy with those that have money to burn… MOST of us do not! Also, 3 weeks is VERY early to just give up on something! We can help and tweak all day long if you’re open to get this thing working. Let us know.