Did republicans whine about mail in ballots when trump won?

i would hope not

Trump won but that is one of the reasons it was stolen 

Disagreeing with something isn't whining about it. The whining in 2016 was done by the Democrats who lost the election, which occurred again in 2018 when they lost an election in Georgia. Stacey Abrams if you forget her name.  Trump was always convinced that the elections were rigged in some parts of the US. And in 2020, the Democrats proved he was right. One theory is that Obama was too busy in Haiti in 2016 learning how to do it. The Haitians noticed.

The Donnie-tards whine about everything, but not about Dementia Donnie's election fraud in '16.

No because hundreds of thousands of votes werent counted for Trump at 3 am across multiple states when Trump won like with Biden

there wasn’t 80 million fraudulent ones to complain about like this time

Nope. Imagine if, like Trump, Hillary had said to stop counting them if doing so was in her favor. lol