This is deeply unfortunate if it's really true, because the prime factor in favor of IRV is that it is the second-easiest system to explain after FPTP.
Approval voting: you can vote for any of the candidates you like, not just one.
Way simpler than IRV.
Score voting: give any or all candidates scores.
Easy explanation.
STAR: score the candidates, there's an auto-runoff where the two highest-score candidates get checked to see which is preferred by more voters.
At least as easy to explain as IRV, and much easier to actually understand overall, particularly in making sense of the results and following what happened.
There -- simple!
Way too complicated for 50% + 1 of the population
Which is, to be sure, not very well, but there's nothing special about the House that makes it work there better.