There were certainly some instances when that Leeds team were victims of decisions that went beyond just not getting the nub of the green. The most notorious was the 1973 Cup Winners Cup Final in Salonika against AC Milan. The referee spent the whole match giving dodgy decisions in favour of Milan. At the end of the match the referee and Italians were jeered off the pitch by the Greek crowd, who knew Leeds had been cheated. The referee was later convicted of taking bribes and UEFA banned him for life. The result bizarrely was not overturned!
Two years later in the 1975 European Cup final against Bayern Munich, a perfectly good Peter Lorimer firecracker was disallowed. Allan Clarke was blatantly brought down in the box by Franz Beckenbaur but no penalty was given. Bayern went on to win 2-0.
As for the bribery allegations against Leeds, the only time they went beyond scurrilous rumours and saw the light of day in court was in 1977, when Billy Bremner successfully sued for libel. In fact if anybody was trying to rig matches for Leeds, they were pretty crap at it as that team were perennial bridesmaids and should have won a lot more than they did. One match where there were accusations of bribery was Leeds' final game of the 1971/72 season where they only needed a draw at Wolves to take the title and double. The Football League made Leeds play two days after the FA Cup final and they duly lost 2-0, the title going to Cloughie's Derby County who were already holidaying in Majorca. Like I say, whoever was doing the match rigging must have been really crap at it!
What Leeds could have done with at the time was somebody like your old manager Fergie, a past master at bullying and intimidating referees to try and get results.
And though I hate myself for stooping to your childish level, I can't resist, how many European finals did "bigger club" Town play in?