Don't disagree with that. The SNP, even before blackford, at Westminster, do come across as a group of clowns, with a one string banjo. But then, so does the entire parliament in the last 3 years, there has hardly been any other discussion than on brexit. And even then, it was the snp that put forward the cross party talks and indicative votes, that may and corbyn couldnt agree on, so it isnt pure cock blocking they do.
The issue is, no other uk-wide party really seems to try to speak or care for scotland, or have the ability to convince the public they do, unionist or otherwise.
Which is why there are many unionists that happily vote snp, will say no to in
independence, and have no issue with being asked again, and again and again (as being asked again isnt undrmocratic). They know where they stand, they trust the public, they agree with snp policies beyond the one main one.