anyone have a blackjack strategy that actually works or is it all variance

I always see people talking about basic strategy charts and card counting, but every table I've tried just feels random most nights. I get that using the charts is supposed to cut down the house edge, but honestly it still feels like a flip of the coin with long cold streaks. When I tried counting cards, even super low key, it seemed like the shoe shuffled any time things were getting interesting, so no real edge there for me. Maybe it's just my luck, or maybe I'm doing it wrong.

I keep telling myself to treat blackjack more like I do roulette, just focusing on managing loss limits and not thinking I have any real advantage. But then I wonder if there’s some strategy or approach out there besides "play perfect, get lucky." Has anyone actually tracked their results long term with any method and seen something sustainable, or does it always just swing back to the house edge in the end?