Do you think dating someone your age or close to your age leads to a healthier and happier relationship?

I've recently dated few girls who are 6-8 younger than me and often there's a lack of understanding and harmony between us and things fall apart quickly. Contrary to girls who are my age or 1-2 years younger that I've dated in the past with whom things seem to just click effortlessly and the understanding was there from the start and honestly I just felt happy being around them. You might ask if things were perfect why did those relationship end? Well, it was mostly my fault as I was young and stupid back then and didn't know how to fix things or let go of my ego.. had I known the things I know now back then I'd never let go of such relationships and I'd probably be happily married by now. Nevertheless, do you think dating people of your age or generation is easier and is more likely to result in a happy long lasting relationship?
Do you think dating someone your age or close to your age leads to a healthier and happier relationship?
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