Your father died and no one told you for three days???? That’s unacceptable. Wow. Your brother was with him when he died didn’t bother to tell anyone? I’d be livid. Three days? We have a funeral next day or day after, you can’t not tell for
three days. Compare to that sending group text about cousin isn’t the biggest offense. At least he informed you! Just wow. What about other siblings? None of the siblings call you when dad died? Wow

Do what makes you comfortable. You can’t change your brother. sorry about your cousin