But just to be honest, you don't think the Dems would be blocking Trump's choice here if they controlled the Senate, whether or not the Garland non vote happened in 2016? Sure they would.In a vacuum, absolutely.
Considering republicans blocked any consideration of a nomination 9 months prior to an election, should democrats just go along with replacing one 6 weeks before an election - after early voting has started?
This is all politics, that whether you like it or not are setup by our Constitution and checks and balances system. Garland wasn't the first nominee to lapse and will not be the last. The Republicans can try to push the new nominee through, and if the public is upset by it can show them in this election or future elections.
Based on Trump winning in 2016, doesn't seem blocking Garland upset enough people, though the Dems gained a few congressional seats.