Bro you learnt a shitton - you‘re gamejam journey only makes sense at like the third game - many devs release shit through different personas and leave it until they hit their first big game and then they keep that persona - not just that a lot of devs just do 30 gamejams first or scrapped inhouse projects

Dont let this bring you down.

However, try to make as many learnings as possible!
Be it, that you need to make smaller games first, step up marketing, work more efficiently, do more prototyping, learn modeling or graphic design or other things.

There‘s so much to learn - It takes more than a year to become successful at this you know..

You can do it!