Very few people are saying that millionaire footballer Dominic Calvert-Lewin is "hard done by". Most posters that I assume you are ascribing this sentiment to are simply pointing out that he doesn't owe the fans anything here, as is the case for the vast majority of players at their clubs. So if he chooses to leave either this summer or at the end of his contract it doesn't make him a villain, which a lot of posters are suggesting.
Once again, we're a weaker team if he leaves. None of our current forwards are equipped to do the role he does for the team. I hope he stays.