Do not refer to how many people don’t answer your messages or immediately start pointing out your faults.
We are all human and all have faults but concentrate on your good points, sound happy and fun to be around.
If someone receives a lot of flirts then this is hardly an original way to communicate and may simply be ignored.
Like any human communication you need to put some effort in to getting to know people and tell them why they should spend time communicating with you.
People read your dating profile to decide if you might be compatible, a list of negatives is not going to help them decide.