IMO "amendments" are made and also "ignored" via an unofficial process.
For example, I can read the second amendment --
> A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.
It is clear the national firearms act is outright unconstitutional by any sane reading, yet it was deemed "okay" by SCOTUS and passed by congress. The amendment was ignored for nearly 80 years and finally opinion seems to be shifting.
In a similar vein, the supreme court previously created a problematic "roe v wade" ruling. Regardless where you stand on the issue, SCOTUS effectively legislated that decision into existence. There was never any support in the constitution for their claims (the cut-off date in particular) or any laws passed (hence it was overturned and returned to the states). It's called "legislating from the bench".
In other words, our constitution is interpreted by a court which can just decide it means something that it doesn't.
It seems we can't repeal the amendments, but we sure can ignore them. And we can't create new amendments, but we sure can just implement them (Roe v Wade).
Personally, I'd like to see the constitution fully implemented to the furthest possible extent. We may disagree on issues, but to the point, we can amend them. A full implementation would also create more sovereign states which enable a diversity of ideas and plethora of ways to live.