Is it a threat to call your ex-girlfriend drunk and say that you want revenge on her for ruining her family?

Failure to implement anything will have no consequences, and the most serious thing is detention. Article 42 of the Law on Public Security Administration Punishment commits one of the following acts, and shall be detained for less than 5 days or fined for less than 500 yuan; If the circumstances are serious, he shall be detained for more than 5 days 10 days, and may also be fined up to 500 yuan:

(1) writing threatening letters or threatening the personal safety of others by other means;

You're just drunk. Make a phone call. It's nothing serious. If handled, it is more likely to be education.