Brentford went up 1-0 after being given a penalty following a long VAR check, but Marsch was left fuming as Leeds' Crysencio Summerville was brought down in the box when they were down 3-1 and the review system did not intervene.
Marsch was shown a red card for arguing with the officials. The American later accused them of double standards.
"I've got to figure out how to have discussions with the league or with referees to help understand how some decisions get made," Marsch said.
"I was speaking with the fourth official, trying to be as respectful as I possibly could, even when a penalty was given that I probably didn't think was a penalty.
"And then you don't see it reciprocated, the respect. That's what I would call it. That lack of VAR visit, in the end to me, is a lack of respect."
On a day of controversial decisions, West Ham United boss David Moyes called the VAR's move to rule out an equaliser in their 2-1 loss at Chelsea "ridiculously bad".
Newcastle United also felt aggrieved as they had a goal chalked off following a VAR decision in a 0-0 home stalemate with Crystal Palace.
Former Newcastle striker Alan Shearer said players and managers had been let down on a "terrible day", while ex-Stoke City and Crystal Palace boss Tony Pulis said human error was still a factor.
"It's not VAR - let me get this correct - VAR just records the TV footage. It's the people who are running VAR," Pulis told the BBC.
"It's those human beings who are making the decisions. It's the referees stuck in that office, wherever they are, making the decisions."
