I hear you. Like Bob Ross might have said, the Blues note was probably a happy accident (that stuck.) I'm sure that whatever you are playing sounds great. Sometimes, whether on piano or guitar, I will make "mistakes" intentionally- and see where it leads me. You can lean into dissonent tones and as long as you finish strong- it only helps to make the piece dare I say more interesting. Many bands have done this- sometimes on purpose and sometimes not. Look at bands like Nirvana and others. In isolation, some of those notes and chords might sound terrible- but as part of a whole- they were a master piece. Instead of leaning away from the tone, they turned the volume up and played louder. Even Kurts vocals were not "polished" in the typical sense of the word. They embraced "their unique sound" so much that they started an entirely new genre. Maybe you are on to something! Play that b5 loud and proud!

Cheers!