My Brooks was the first to ever give me saddle sores, and that's after having used some pretty serious ass hatchets in the past. It's definitely a quality product and it's better now, but break-in is a bitch.
Were you wearing padded cycling shorts? Those are said to actually prevent the saddle from molding itself comfortably to your sit bones.
Me, I spend half of every year cycle-touring the world, wearing ordinary cotton underwear and Fjällräven expedition trousers on the bike. My Brooks broke in after 500 km without sores and only a modicum of discomfort, and after that it has been like I’m sitting on air as I ride.
I've never found padded cycle shorts very comfortable and find it quite annoying that finding good quality cycling shorts without padding is getting difficult. Without padding they can also be used for other forms of exercise/sports.
Me, I spend half of every year cycle-touring the world, wearing ordinary cotton underwear and Fjällräven expedition trousers on the bike. My Brooks broke in after 500 km without sores and only a modicum of discomfort, and after that it has been like I’m sitting on air as I ride.