Should divorce be more difficult?

Getting married should be more difficult. Divorce should be easy.

No. It should be easier.

Are there serious proposals about this anywhere?

From the article:

As the Vox article documents, conservatives in several states have proposed legislation to make divorce more difficult. Based on the data, these proposals are likely to be unpopular.

The article also notes that even among conservatives, less than 50% say divorce should be harder.

My reaction is that the USA hasn't trended towards majoritarian law making recently, so the actual popularity will not determine if divorce is made more difficult.