He was never going to be convicted but the finding of guilt still stands.However, the impeachment didn't secure a conviction of Trump - he was acquitted.
He wasn't impeached because of anything relating to the 2016 election. He was impeached because of his unconstitutional, illegal behaviour while he was president.I think both sides, after losing an election, need to accept reality and the results of the vote, and focus on winning the next election rather than always focusing on what happened last time.
The leadership of the Democratic party was opposed to impeachment, it was his actions in requesting foreign interference in the 2020 election cycle that forced their hand.