THE GOGGLES THEY DO NOTHING
The episode that started it all. Oh man, so many cliches that bored out of my mind. I know this is useless now that you already made the third episode, but seriously, I know you keep saying that you do your best, but please improve your series. I mean my eyes melted from watching the failure of this animation...you'll be hearing from my lawlyer for this.
Although I'll do say some positive things about this. Ofcourse this is your first animation, nobody is expecting for you to just SWOOOSH your talent in one night. So for a beginner, I give you a 7 out of 10. For the story, I already stated this before that your story is a pile of unoriginality, is it too much too ask to go back to the storyboard and change some things about Sore's motive? I mean whats the whole point in destroying random famous mythological creatures? Is it because they are just "bad" or is it because he does it for the lulz? Animation wise, they're is a problem of a slight pause between every action a character takes (such as swinging a sword, or unleashing an attack etc) its annoying.
What is Sore's dox? Where does this series take place? What are the main character's motives? How can you smoothly flow battle scenes and make them more exciting? These are but a few questions you have to ask yourself if you want to make your series.