Am I overconfident about my writing abilities?

It is important to believe in yourself, but lemme tell you, you have a defeatist attitude.

Writing is indeed a job, and you need to do it whether you feel like it or not & sometimes you won't, but you should need it like you need to breathe.

You will recieve massive criticism, no matter how "great" your work is...i've read some fantastic anti-shakespeare raaaaants. This is part of the job discription when you create art for others to consume, and it WILL happen. Your willingness to throw in the towell if your art is not recieved well is not a great quality for an aspiring writer. You have too keep at it, keep writing. It shouldn't be all or nothing...it should be...ok, what can i do better?

There are a million wanna be writers; some of them are fucking talented. If this is your dream, you need to work harder at it & you need to not give up when you have setbacks because, unless you are incredibly lucky, you will.

You can do this if you want to.