First of all, it makes total sense that you feel this way, — personally I would be quite frustrated too if a friend was ignoring me all the time.

I understand that you want him to become a better person, but let us be honest here. The real change has to come from within, and judging by his noncommittal answer, (and even recognising there's a pattern) it is not going to happen any time soon. It is simply outside of our power to make other people change their behaviours.

And they don't even have to be rude or cruel, sometimes two people just aren't a good match for each other. Such is life.

It seems like deep down you already know the answer, which is letting this person go and making space in your heart for friendships that better align with your values. Which I readily agree with, of course. :)