Me too! Ive killed a lot of seeds the last couple years,sadly. BUT i do live in a cold environment,where just a little too much water can Dampen them all off and die.
I did get some seeds recently from Sannies (Silverfields),he sent me some free Spongepots that came with some BACTO, i got them all to sprout this time. I think the bacto helped keep some of whats been killing my seeds at bay. And the spongepots made it harder for me to over water them on accident. I also did not do a short seed soak in water.
So hopefully my seed murdering days are over.I think i had just gone on for so many years with things being fine and i didnt realize i added a step and started killing my seeds like an idiot.