Buying elections? That's the only counter-argument to your point you could possibly think of?
Well, there's other things, but:
Gerrymandering? Only applies to the U.S. house, and it's not like the dems would have the house majority right now if gerrymandering didn't exist, republicans won the national house vote 51-45% last year.
Electoral College Problems? Only applies to the presidency.
Have you heard of problems with electronic voting? It's not like the fact that hundreds of votes go missing in elections on a frequent enough basis is some kind of conspiracy.
Also, by bringing up that the Republicans won the national House vote in 2014, how do you explain 2012? It's not like the popular vote is even the
only problem with gerrymandering in the first place.