I've never found good relationships when looking. When I decided to just focus on having a happy life in and of myself, I forgot about relationships for a while and soon thereafter, good relationships just fell into my life.
I think the success of looking vs not looking depends on the person, lifestyle, stage of life, and what you're actively doing to look or not look
You can't manipulate the universe by deliberately not looking, it will call your bluff. But when you focus on yourself and being an independent person with a healthy mind and body, you naturally attract the kinds of people you want in your life.
When you look too hard, you begin to appear dependent. Nobody wants to be dated just to fill a void.
“As I am sure any cat owner will be able to tell you,
someone else putting you in a box is entirely different
from getting into a box yourself.” —bisexualbaker