I think we'd all love to. The constitution is fundamentally broken and should be completely rewritten. It's founded on ideas that just aren't true now, if they ever were. The idea that the states are more like countries than counties is the biggest one. The idea that we can and should protect ourselves from the tyrrany of the majority by having independent branches of government and countless ways to stop and stall things is another huge one.
But here's the biggest problem, not enough of the country agrees that the system is broken, and even smaller portion of those who do can agree on how it's broken or what changes to make. So no, we can't just abolish it. We can either (1) fix it enough to get to the point that we may be able to have the stability it would require to safely transition to a new constitution or (2) see things get so bad that enough of the country is on board for revolution. Both options suck, but option (2) has a pretty bad record compared to option (1) in my view.
In other words, "no, I won't stop desperately trying to abolish an nationally popular system and ignoring that it hasn't been possible for centuries even after a civil war, instead, I'm just going to refuse to do anything to help within the rules of this system that might be able to improve life for people care about over and over and over again eve though history shows us things can be made better"