On the contrary, FiveThirtyEight came off looking pretty good this year. Where other poll aggregators where giving Clinton very high chances, their models continued to maintain that Trump had something like a 1/3 chance. They also correctly identified the level of polling uncertainty in the rust belt, and how tight the race was in Florida (a state which continues to be the most important swing). There is this ongoing narrative that the polling wrong, when actually the results fit neatly into the level or uncertainty that the polls were suggesting. The same narrative had taken hold about Brexit polling, which is also wrong - the polls in the UK correctly indicated a close race.