LED bulbs are rated in hrs of life. Usually about 20,000. Even if you left the bulb on 24/7 for 6 months it amounts to just 4300 hrs.
I’ve had LED for yrs and just 2 have failed and they were replaced at no charge by the mfg.
Yours is an interesting problem. Perhaps if you called the mfg of the bulb they can help you determine why the bulbs are failing so quickly.
My LEDs also last 6 months. None of mine have lasted a year.
What you might be seeing is unclean power. The electronics in both LEDs and CFLs is sensitive to such things. When I was younger (much), we had an issue with a transformer nearby that caused all kinds of havoc because it was crap, and was causing small voltage variances that some of our electronics didn't like at all.