So let me ask this question, taking your example of repealing the 17th Amendment.
Let us say that an Amendment to repeal the 17th is passed. What do you plan to do when an activist judiciary at the behest of the Ruling Class and their Praetorian media, rules the repeal 'unConstitutional'?? It goes to SCOTUS - they rule 5-4 against the Amendment, 're-interpreting' Article V to be restricted to the Congress to propose Amendments per precedents - Scalia, Alito and Thomas dissenting.
What do you plan to do if Obama decides to use his pen and phone to nullify the repeal by 'executive action'?
None of this takes into consideration that during the process itself, Holder and the Just-Us department begin various 'investigations' of states that sent delegates to the Convention and/or IRS intimidations of delegates and so forth.
What's the plan to make sure what Article V passes is implemented?
Since bold despotism is at the door as you say - how do you expect to get the despots in power to abide by what is passed and ratified when they will pull out every effort to render it null and void?
What is the plan of action when these efforts are deliberately thwarted by the oligarchy? The lawless are not going to abide by or acknowledge the law.
So what do you plan and propose to do once that happens?
I plan to impeach and remove those jurists. I plan to have withdrawn judicial review on this subject by the amendment itself.
What do you plan to do if Obama decides to use his pen and phone to nullify the repeal by 'executive action'?
I plan likewise to impeach and remove the president.
Please be advised my scenario is just as valid as your scenario. Neither of us with confidence can predict the atmosphere post amendment. Surely, operating as we agree we do within a patina of the rule of law, trespass against that rule of law in form and substance by jurists or president will turn public opinion and even the media against them to some presently unquantifiable degree making impeachment easier.
Do not forget, the amendment process envisions procedural as well as substantive revisions making it more difficult for both the Supreme Court and the president to behave extra-constitutionally because they have been removed from the process.
Think of it as MacArthur in World War II who, facing endless islands of fanatical Japanese resistance changed the whole strategic balance by leapfrogging and leaving isolated Japanese remnant forces to starve and die of disease. The Article V process is conceived of as just such a strategic thunderbolt which changes the battlescape and offers battle on more favorable geography and with better odds.
If you are going to fight a war, you better know your enemy, you better know yourself, you better know the ground you stand on and what the reality of the situation is. If you want to title that 'despair', then I submit you are not ready for war. You would be a Romantic who assumes rhetoric and bravado are enough to rally a lukewarm and complacent people to victory.
Please cease implying naïveté when we advocate engaging the left. It is the advocates of Article V who are trying to reshape the battlefield.
On what possible basis could repeal of the 17th be challenged?