If repeal of the 17th amendment is the only ratified change then it will be worth it. Over time this change alone would begin to restore liberty by shifting power back to the states. Repeal of the 17th, will also have the effect of term limits and would make lifetime celebrity senators extinct.
The problem with statements like "no one is enforcing the Constitution we have" is that it's simply not true. The Constitution can not and is not being ignored in this country. What is happening is the left is finding loopholes and weaknesses in some of the wording and exploiting those weaknesses.
Simple changes to the constitution can slam the door shut on the left. Repeal the 17th, remove the commerce clause, clarify the wording of the 2nd. etc.
But you don’t expect the republicants to do anything like that, do you?