There are no two sides to this, if someone doesn’t want to talk to you it’s in their prerogative to block you for any reason or no reason, no questions asked, they don’t have to acknowledge you in anyway whatsoever. Once you can see over that hurdle you won’t feel hurt if you get blocked or they don’t acknowledge your messages.
If you feel hurt it’s your problem, not the person blocking or not acknowledging you, they don’t have a problem.
Maybe people should check their egos at the door.