Hey there man sorry you're frustrated... :buds: burn one and try to look at it like a learning experience, my first grows in life were not good at all, bag-seed from Mexican brick that I cut early.... Blech!!!!!
Now years later I have much less problems but am still learning, hopefully everyday!
Forgive me if I am repeating advise but:
At this early in the game (11-15 days right?) there shouldn't be any nutes involved at all with soil, so try just feeding PHed water, the litmus test is just fine for accuracy... if you have other seeds try running a few but not all in a different lightly nuted seedling mix and see how they look. Also transplants are a big enemy of auto-flowers if not done at the right time, to the right size container. The best possible thing that can be done with autos is a perfectly timed tier transplant setup, or planting in the container it will finish in.