It is a man's job to set the TONE in a relationship. A woman feeds off his energy. This is why showing up for her and being consistent is so important. She CAN'T feel safe with you if you're not leading properly.
Make inconsistency your number one dealbreaker and watch your love life improve. They can't communicate, be considerate of your time/feelings or make the effort to make you a priority? Fine. Life's too short to spend waiting on people or wondering if/when you'll hear from them.