With Mark Hughes’s side 1-0 up thanks to Manolo Gabbiadini’s opener, Austin appeared to put Saints 2-0 in front in the second half.
However, referee Simon Hooper disallowed Austin’s effort as he thought Maya Yoshida had got the last touch and he was in an offside position.
Jose Holebas equalised with just eight minutes left at St Mary’s to earn a share of the points for the visitors.
And Austin launched into his tirade against the officials when he was interviewed by BBC programme Final Score.
Here is most of what the he said and you can hear every word in the video below.
“It’s ridiculous, they shouldn’t be in the game, We scored a perfectly good goal that was ruled out for offside. The officials cost us two points.
“They said it was offside, that is a joke.
“People go on about VAR, they clearly need help.
“If this is the best, most-watched league in the world then give them all the help they need. It is a joke.
“Sure there are many positives, we worked hard, we deserved three points and we would have got that had we not been let down by the official.
“We feel like we have been let down. I started well, worked hard to be up 1-0 at half-time and we stuck to the plan.
“We didn’t get beat but we should have gotten away with three points going into the international break.
“The performance was there, we can take that away and we should manage the game. I’m angry is what it is, we should have won 2-0.”
Defender Yoshida, who played a big part in the controversy, said he understood why his team-mate was so upset.
He added: “It’s clearly not offside from me, I didn’t connect to the game. So it is a shame to drop two points from the referee but what can I say.
“The referee realised they got it wrong. I heard that he said that.
“I don’t like to talk about the ref but it is painful for us. We showed more character. We will move forward.