Why do we only acknowledge rewarding synchronicities and not bad ones?

It is because we have the notion that 'rewarding' synchronicities occur by chance, and 'unrewarding' ones occur when we lose such chance.

Life does not occur by chance and chances are not given or taken.

The 11:11 synchronicity serves to remind people that life is carefully preplanned by the soul. 'Rewarding' synchronicities occur in parallel alignment beside 'unrewarding' ones. They were both preplanned into 3D lives to help souls learn and understand the nature of the 3rd dimension reality so as to gain enlightenment and ascension to a higher dimension.

The aligning figure digits of the 1111 in '11:11' represent the call for parallel alignment of the Lower Self with the Higher Self.

The call of the 11:11 becomes 'alarmingly' louder and frequent as soul destinies and timelines converge in their own alignments in approach to the end of the 3D time spiral in 2012.