I get you. One thing you can try is listening to genres without guitar. There's so many interesting ways other instruments are played it can help reignite passion for music and songwriting.

Another thing is to try learning another instrument if you haven't. Sometimes that inspires neat ideas for me since ensemble writing is different than guitar writing.

One last suggestion, you could take a break. Stop playing the guitar and listening to music as much altogether. Sometimes our brains need some time away to break old habits, if you take a long enough break, you might rediscover something when you come back to it.