I think we can avoid abusing the things that keep us alive, that give us this day, that shape our life (in whatever shape it might be). Whatever the texture, shape and structure, it still is our life. It's still a flower (even if it's badly mauled and ruffled by circumstances) and it still belongs to the genre called 'life'. And the manifestation as a 'life' is an incentive by default. We are manifested and still get a chance to evolve and manifest more. A blade of grass manifesting its life in famished desert sands is as important as a luxurious devdar in rich, salubrious, rainfed hills.
This body, parents, siblings, friends, partners, deities, everything in fact has been responsible for this life that we see defining us at the moment. Irrespective of what we think of them presently, didn't they touch our lives positively and meaningfully when we needed them or crossed path with them? Please recall that spark and excitement when we initially met them!
We meet people on the way and move on and meet new people on the way. That doesn't mean the ones left behind were bad and the new ones arriving in life are better. They are equally good or bad. Everyone is equally imperfect but even with their imperfections they have something to offer to us and we to them, which shapes one phase of the journey. They are the ones who get us to a point of being positively touched by the newer people.
If I judge those who were left behind, it would be like condemning the lower steps on a ladder after getting to the higher ones. Would we have reached the top step--for example, reaching a stage of finding an ideal soul mate--if not for those nice lower steps, those nice people with whom we broke up in the past? The relationships are like a ladder. It's a journey basically. Different people that we meet are beautiful, strong steps on the ladder that bear the weight of our feet and help us take the next step. And we are just the same to them. We too were low at the time when we met them and that's why we stepped on that rung and found it helpful. So did they.