Patrick Bamford scored a last minute equaliser to help Leeds steal a 2-2 draw with the visiting west London club.
But Bielsa feels Leeds did enough to deserve all three points at Elland Road.
He said: "To have drawn the game the way we did, it changes the flavour.
"But, if you look at the game in its general context, we should have won it. We conceded the first part of the game, but without receiving any goals. From the initial 15 minutes onwards, we had a good half an hour.
"In the second half, we started it well and we had incomings and outgoings of Luke Ayling and Kalvin Phillips, where we were a few moments without them.
"After Kalvin went back on and came back off, that made us lose organisation. But, it shouldn't have been this way.
"In those 15 minutes in the second half we did receive the goals, but the final 30 minutes there were a lot more difficulties, but with a lot of perseverance to attack.
"I think we ended up getting a result that was fair on one side and insufficient if you look at the whole game.
"We dominated two thirds of the game and we duplicated the amount of dangerous situations that we had, compared to the opponent."
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