Most of the erosion is done through court challenges.

Historically, courts have maintained that legislation is pursued under "good faith". This was the justification for not overturning ACA on the grounds of it being an unconstitutional tax: the lawmakers didn't mean to make it an unapportioned tax, even though it effectively is, so it's okay yall. Washington St just did this with income taxes on capital gains in direct violation of their state constitution a year or two ago.

Where I live, you cannot open carry. That is a direct violation of 2A, but the courts have said it's okay baby because it's not an undue burden to pay a fee and waste a day of your life. Pure nonsense. Just change the constitution for goodness sake.