Sounds like your flower just isn’t getting hot enough to turn that THCA into real THC. THCA on its own won’t do much until it’s heated enough to fully convert, so weak hits or low temps can make the whole batch feel like a dud. I’ve seen clearer breakdowns on sites that sell hemp products, like CBD wholesale, which explain the THC vs THCA numbers in plain English and make it way easier to gauge what you’re actually getting.