Weird, I've used Conti for my "nice" riding for 5 years. First the 4000's and now the 5000's. I'm conservative when I change my tires and change them out at around 2,500 miles and there was life in them according to the Conti tread marks they put on their tires. I tried some Michelin Pro 4 Endurance for my commuting tires when living over in the UK, but went back to Panaracer Gravel Kings which are my 2nd favorite tire after the Conti's.
I ride only road, weigh 230lbs and ride a mix of hills, some races (mostly crits) rolling hills and some miles on MUP's too.
I know Shane Miller did a review of his Conti 5000's and was at 5,000km on them and still going strong. But lots of people don't like them. Hopefully the Michelin's work out for you but you seem to wear out tires rapidly.