Oh Venice, you are so wonderful, and so overcrowded with tourists!
I would recommend visiting Venice, if you want to, in the off-off season.
Several years ago we visited in winter and there were no crowds, even in Piazza San Marco. It is also much less expensive.
It is cold in winter, but so lovely to see Venice as she should be seen, in all her solitary glory, with locals who are actually happy to see you.
Cheers to you from amazing, but crowded Venice~