Strawberry plants are very sensitive to the depth they are in the soil. If the crown (where the roots meet the stems) is a bit too deep or a bit too high then the plant will not survive. If it is a tiny bit one way or the other, then it will survive long enough to get your hopes up but will never do well. And then it dies.Why don't you just leave the strawberry plants in the bed and cover them with compost?
I'm not very good at it. I get it right then mess it up when I water them. We've planted strawberries at all but one of the houses we've lived in and I still try but mostly get a good patch from the runners when they plant themselves at the right depth