Well, at least you were told where you need improvement. 
I'm on my 4th draft now... Back in January, my stepmother wanted to see my WIP after my 3rd draft (after she'd read my 2nd draft last summer and basically told me that one of my major characters wasn't coming across as I had intended him to), and a few months later my dad had to tell me she never finished it -- she couldn't even get through it! 
I seriously thought about just chucking the whole thing, not bothering to do anything more with it. 
GR: We've all been there. I'm constantly there and ditched stories in the process. Twenty three times, actually. I have a massive folder of withering paper (I write longhand) stories that I will never do anything with.
As for your parents, that's also happened. In fact, Mum has often criticised my work. Purely because I write for children. That's how I address it most times. Even declaring that I am a "children's writer" is an immature label.
Also, consider one thing:your parents aren't the target audience. Join a critique group and get a proper perspective. That is advice consistently given at our SCBWI chapter group.
And where possible ask children.
That might not be helpful, but it's how I have coped over the thirty years that I have written.
As for me, I was in the coffee shop yesterday where a mother and her two children sat next to me and I hit a mental block so I put my pen and got talking to them. I got talking and read a chapter from WIP.
"I like her," said one of the children (of MC), "but she's not horrible enough".
I have decided to continue with the story. Just to finish it. If the cat will permit me. He is definitely a reason to write elsewhere. I am sitting on the bed with two laptops and it's extremely uncomfortable.
Where is that voodoo icon? I seriously need it. It may be cruelty against animals but I seriously need to send Spock a message!
First, I must remove my Vulcan cat and get the pen and paper out.