Seeing flaws in your craft and hating those flaws is absolutely normal, but, on the flip side, you should never be ashamed of liking your own work. I am personally not down with the "lol I hate everything I've ever done" thing. It genuinely pisses me off. You
absolutely should think your stories are interesting, fun, meaningful - whatever you're trying to achieve. If they're not interesting to you, make them so. Write the things you want to read.
This craft is hard. Lifetimes-hard. I've never written a perfect line, and I'm not even sure I want to: all I want is to write the right words for the story I'm telling. But that's incredibly, colossally, stupidly hard. Like everyone else here, I have literally stared at the page wondering if I even know how to form a sentence any more. Some days, I've decided that I don't.
But. That doesn't stop me loving what I am
trying to make. It's only
because I love the things I'm making - the characters, their stories, their worlds - that I am motivated to try in the first place. Knowing that it could be great, that it could be what I want it to be, if only I worked a bit harder... that pushes me to do better.
It's time to haul out that old Ira Glass quote:
Nobody tells this to people who are beginners, I wish someone told me. All of us who do creative work, we get into it because we have good taste. But there is this gap. For the first couple years you make stuff, it’s just not that good. It’s trying to be good, it has potential, but it’s not. But your taste, the thing that got you into the game, is still killer. And your taste is why your work disappoints you. A lot of people never get past this phase, they quit. Most people I know who do interesting, creative work went through years of this. We know our work doesn’t have this special thing that we want it to have. We all go through this. And if you are just starting out or you are still in this phase, you gotta know its normal and the most important thing you can do is do a lot of work. Put yourself on a deadline so that every week you will finish one story. It is only by going through a volume of work that you will close that gap, and your work will be as good as your ambitions. And I took longer to figure out how to do this than anyone I’ve ever met. It’s gonna take awhile. It’s normal to take awhile. You’ve just gotta fight your way through.
Try something. Next time you stare at the page and hate everything you've written, reach out to another author you know and tell them something you love about their work. That writer might be feeling just like you, and that compliment could be the motivation they need to keep going. We all feel this kind of imposter syndrome at one point or another, but the important thing is to keep going, keep fighting through. Surround yourself with good people who give you the support you need in that fight. And don't forget to love what you're trying to produce.