It's no big deal. There's no shame in it. I didn't start a few races when I was injured. Now I don't enter any races at all!! LOL! I think you have to ask yourself why you are running.
So, what's my story? I used to race once a month. I didn't enjoy the club league races. I didn't enjoy the big (overpriced) events. I remember I was doing a 10K once, and thinking half way round, "why the f*** am I foing this, I'm not enjoying it". I enjoyed far more, the slow cool-down jog afterwards. I like running. I don't like racing. But I am motivated by the challenge of running a marathon. However, you need time and space to train for those.
I used to be obsessed with running. Running took priority over everything else. It was a friend of mine who made me realise I'd got the balance wrong. She pointed out to me that my reasons for running were a destructive obsession as it was all about training to beat PBs rather than about enjoyment. This was a "wake up call" for me. Never had truer words been said.
I think for me, life has moved on. I still run three times a week, but I don't "train" anymore. I just do it for enjoyment, just like my cycling is purely for enjoyment. Yes, I get out there for over 5 hours on the bike sometimes, but I'm not training for anything, it's purely about enjoying cycling, which I do.
Yes, I think I will enter another running race one day, or even a duathlon, but if I'm not going to enjoy it, or enjoy the challenge of it, then it's not worth doing. Life is too short