I don't get all this "worst #1 seed ever" as a criticism against the Celtics. If we're actually the worst #1 seed ever, then shame on Cavs, Raptors and Wizards that couldn't end up above us in the standings.
Or another way to look at it would be this: Forget our position in the standings and ask yourself "How do I feel about this team winning 53 games?". Me? I feel really good about it. If we ended up with the fourth seed, then we would be "the best fourth seed ever"?.
Just forget about that and enjoy the ride. This team had a great regular season and is 2-2 in the first round, has a great pick coming up and some decent cap space. Life is good.