So I just had a game on pearl, where I was playing A if defence solo with Brimstone.
If I hear the enemy push from both A main and Mid Connector, putting me completely surrounded. What should I do? In this specific game, my team pushed Long instead of defending the site. So I was 100% alone for the entire A site take over.
I tried to put up smokes from A main, but the enemy team just creept up behind me through all 4 paths, that I felt the only safe spot I had was hiding in my own smoke, but even that was just rushed through and I got shot in the face. I knew every enemy player position, but I could not bring a fight to a single one of them as I was armed with a Stinger as Eco round.

So I ask for advice, what could I possible done to kill them, group up with my team, or stall long enough for my team to come and aid mid?

My team took the longest way around to reach A site, and we had no one mid covering.
And before some jerk ask and blames it that my teammates are at fault, please I'm trying improve myself, not my RNG teammates.