Not really, its just that the black mesa theme is kinda overused after all those years.
But still I liked the maps and like the other say you should be happy they got released at all.

Getting new good sven maps these days is rare and even though I understand that those maps were started back in 2003 or whatever the gameplay is interesting enough to keep the players on their toe. And the detail was also more than enough.

So no I neither agree nor do I think it is obvious they are "terrible"