Arma 3 Campaign | Signal Lost Impossible?

I've played this mission at least 20 times now, I just can't seem to find the best strategy that doesn't involve me becoming terribly injured by a 6 team squad that I can't even see.

Any specific tips or strategies you think I should try to beat it? I'm not too frustrated, I had fun with the attempts. But it doesn't seem beatable for me. Too many enemies I bump into.