What “new” constitution? We’re talking about a proposal of amendment(s). Congress would never ever propose term limits. It’s up to us to do so and a CofS is the way to do it.
And what ever is proposed still has to pass muster with 3/4 of the states.
A convention is a way to get The People openly talking and thinking about it. Maybe it doesn’t work, then again, maybe it does.
Why not try? Sitting on our hands isn’t working.
Still won’t get the 3/4s. All a CofS would do is put a bunch of people in a big room to disagree with each other and not do anything. We already got lots of that.
You want to break the stranglehold, vote 3rd party for state legislatures. It’s the legislatures that make the congressional districts, and through that force the 2 party system. Break that, break the 2 party system, get alternate voices, force the parties to actually stand for something other than themselves. That’s the only path we’ve got.