seenthelight just read what you put above, this one stands out for me.
Feeling worthless as I wasn't as succesful as others even after sacrificing so much of my time
Don't forget during all your training you'll have been told to not look left or right, not to worry about what other people are doing, it's your journey, concentrate on your own business. Worrying about how others are doing but not working on your own is why it's not working. But then in the same vein you're told to attend success days where you have to listen to how these people got their promotions and are earning £1000's per month. You're pulled in so many directions all the time, it's exhausting.
I'm so sorry to hear you came away with £3k of debt. I walked away with £1k on my credit card. Slowly paying it off