Correction, Calvinism grants no mercy. God grants mercy to those unable to come into contact with Christ. Doctrines aren’t the main idea. Forgiveness is, which isn’t a doctrine we learn.
According to your belief, does someone first have to accept Christ to be granted forgiveness and be saved? But how can someone accept Christ if they haven't been exposed to Christ, which those that I mentioned in my prior post, for reasons outside of their control, will never be able to? Forgiveness isn't a doctrine that we have to learn but can only be possible if first been given by God solely as a gift - that is where preselection, mercy and grace enters in. According to freewill however, the receiving of forgiveness isn't first and isn't how freewill works - according to freewill, it is received as a result of a person's choice not before the person's choice, is it not? Which means that to be able to choose, they'd first have to be able to perceive, which many cannot for a multitude of reasons. So, the question remains: what happens to those who cannot perceive?