The Steele Dossier was commissioned in 2016, before the election. Trump is claiming the 2020 election was "stolen" well after. Both bad. But not the same.
Trump's allies challenged the election results after losing, 60 times. (edit to add: Challenging, and getting their day in court, is fine! However,) No credible, election-result-changing fraud found. (edit to add: Despite losing in court, they continued to spread debunked conspiracies, and still claimed it was "stolen" without evidence. And still tried to hold on to power, Trump asked Pence to "do the right thing", and declare Trump the winner despite losing. This is the bad part.) Clinton did not challenge the election results after losing. Not the same. Not even close.