Hey, bro. It's ok. You can fix it. The pH level of your soil is bad. Are you sure you are not overwatering it? I bet the humidity is too low. See how the ends curl down? Check your pH and increase the humidity to 60-70.
Trace elements, feed it anything with trace elements, make sure humidity is @ 60% in veg 50 in flower, cut off all those leaves and hopefully they get back on their feet, and foilar spray them with the tea u make to root feed them.