this is a great example of a loss that could have been prevented in the team builder. relying solely on sliggoo to check every special fire, grass, and flying type in the tier is not sustainable and will leave you vulnerable to offensive teams like the one shown here. resting with sliggoo may have delayed this loss by a few turns, but over the long term that sliggoo isn't going to beat a life orb magmortar + viv using resttalk.
an unfortunate critical hit vs the audino, but rest talking against a mon that can high roll to 3hko you is a pretty low percentage play most of the time anyways. mawile as the only real aurorus check before mega'ing with audino makes this early game tough but being proactive and aggressive in the early game by leading mawile and always attacking the threat when given the opportunity can smooth out some bad matchups like this. keep your chin up bud, sometimes you're opp gets a win with a shit mon thats unviable so just pretend that empty space was one of those ig... should prob learn to bring more consistent teams vs wild player like this tho.