Yes, pinching someone's cheeks hard can be considered a form of abuse, especially if it is done without their consent and causes them pain or discomfort. Physical actions like this can be seen as a violation of personal boundaries and can be emotionally distressing for the person experiencing it.
Abuse is not limited to only severe physical harm; it can also include actions that are meant to demean, control, or intimidate someone. In the case of pinching someone's cheeks forcefully, it can be a way of exerting power and control over the person, and it may cause them to feel humiliated or disrespected.
It's important to remember that all forms of abuse, whether physical, emotional, or psychological, are unacceptable and should not be tolerated in any relationship. If you are experiencing this kind of behavior or know someone who is, it's crucial to seek support and help from friends, family, or professionals who can provide guidance and assistance.