I get a medium roast from Tanzania that I grind coarse, ≈20g per .3L (roughly one mug) and brew in a French Press at 200°F for 3-5 min, and, that, my friend, is the single best damn cup of coffee I've ever done had.

I used to do something similar to you. Roughly 30g of beans to 1L, and I'd drink all 3 milder cups. But switching to one cup full strength followed by plenty of water with lemon has become my new morning routine and it feels and tastes great!

To each their own, of course. Enjoy your bean juice!