Good martial arts:

1) must be able to train safely and long term (so Muay Thai is effective, but out);
2) Must be able to defeat a large opponent.
3) Must be able to defend against groups.

People attack when they are larger, or outnumber you.

— Ian Welsh (@iwelsh) October 14, 2019

Krav Maga. Yes, all the bros love it, but it works.

The truth is that there is little you can do to defend against groups unless you are a world-class fighter. It’s just not possible. Two people, maybe, if you get lucky. Three or more? No. Your only hope is to brutalize the first person so badly and so quickly that the others lose heart. But mostly, you’re just fucked. Running is really all you can do.

That’s just reality. Life isn’t a movie. You aren’t a superhero. If a group wants to hurt you, most likely they will.