There was standing, but the judges refused to look at the evidence that we all saw in real time.

Because the system is intentionally designed so that almost nobody has standing to challenge election results. After Jill Stein of the Green Party sought recounts in three states in 2016, the Democrats and Republicans passed bipartisan laws to prevent third parties challenging elections, and severely restricting when and how the losing party can challenge the results.

The bottom line is that the American electoral system is deliberately designed to make it impossible to prove fraud. If you literally filmed electoral workers shovelling ballots into a bonfire, and then just typing whatever numbers they felt like into the computer, you still couldn't challenge the result unless you were the losing candidate, and the losing margin was only a small percentage.

Because they were leftist judges

More than half of them were Republican judges, and two of them were appointed by Trump.

You Americans will never, ever fix your political system so long as you live under the illusion that the choice between your two major parties is not a choice between Kang and Kudos. You have a choice between the Big Business Party that supports never-ending war, and the Never-Ending War Party that supports big business.