Take a break, eat a snack, and then come back and draw some more comics.
Comics is VERY much something you're in for the long haul. No one is amazing at the start, no one has it all figured out, and putting art and writing together in a way that makes sense and is good is a skill you have to practise.
Also, you need to practise accepting your failures. Everyone fails, and we keep failing until we fail better, and learn from our failures, and become better comic creators.
The first stories I wrote - and the first comics I made - were complete trash. They were terrible. So I wrote more stories and made more comics, and they were still terrible, but slightly less terrible because I was trying something different. And so I kept going and going, making new comics and telling new stories over and over until I learned how.
If you're stories are bad, you just need to tell more of them. The same way no one sits on a bicycle for the first time and magically knows how to ride it perfectly, no one is magically the best at storytelling the first time they try.
Invest in some patience and some determination, and keep going.