<3

Not only does '<3' mean "I <3 you" or its used in a way to show love and affection. It's a term/symbol used in a sarcastic manner. Mostly used by people in text when they're insulting you.

Example.
'Go die <3', 'you're stupid <3'

Or in any other insulting way

<3

Not only is '<3' used in a way to show love like "I <3 ------' but it's also used to insult someone but in a kind, mean, sarcastic manner.

Example.

'kindly eat a handgrenade<333' or 'this is why your father left <3'