this is an interesting question...
I don't think people are "entitled" to a relationship, exactly...like, "entitling" sounds like you own the person, like "hey I've been nice to you for a while that means date me you're mine now huahuahua" sort of thing.
Deserving is a bit different.
I think everyone deserves to be happy, and if someone's idea of happiness=a relationship and they find someone who they can be happy with and who feels the same way about them, go for it. And vice versa, if someone is happier without feeling the need to have a relationship and prefers being alone, then go ahead.