lots of people feel this way so your not alone in that sense.
one thing ive found to help is having likeminded people around all working on either a similar project or the same project as you.
a colaboration is a great way to balence different ideas from diferent view points, and the end result is always greater than the sum of its parts. sometimes its just the dialogue between two creatives that can get the brain thinking about things you wouldn't have thought about otherwise.
for example i was doing a game jam (https://itch.io/jam/dream-arcade-archive/ this one) where we had to make a arcade game that we would have liked to see but couldnt due to the hardware limitations of the day.
i talked to a friend about it and we came up with an idea for a 2d platformer where an indiana jones type charactor colecting artifacts on diferent worlds before some disaster happens and you have to rush back to your spaceship
https://jacobsmith3204.itch.io/antiverous(link to that game if you wanted to play it)
without that help from my friend, i would have never came up with the ideas that ended up becoming the game i ended up making. it is one of the best gamejam games i curently have made and i cant take full credit for it even though i alone programed and animated everything.