Two Steve Morison goals put the visitors 2-1 up but a late Glenn Murray goal, his second of the game, salvaged a point for the hosts.
However, Holloway was disappointed, feeling his side did not convert enough of their chances and that Leeds should have been reduced to nine men.
"I felt some of the decisions had a huge bearing on the game," said Holloway. "I thought I saw Luke Varney foul Johnnie Williams from behind, a blatant yellow card.
"Two minutes later Varney dived and got given a yellow card, and he should have been off.
"Then, two minutes later, Wilfried Zaha goes straight through and gets scythed down and (Stephen) Warnock gets a yellow - if that's not a goal-scoring opportunity, I don't know what the rules are.
"Unfortunately, I'm sat here pretty bemused, wondering how we were behind in the game. I'm delighted we came back but I was a little bit aggrieved, we missed too many chances."