I can't find criticism of William Blake's works in EBSCO, can you help?
There are quite a few articles on Blake's works in EBSCO. One thing that might help is to search all EBSCO literature related databases at the same time. You can do that from the All Literature Databases tab in How to Use Literature Databases LibGuide or the Literature tab in Databases by Subject LibGuide (links below): select All EBSCO Literature Databases.
Don't forget to also try Literature Resources from Gale (also available from the links below). There are quite a few articles on Blake's works there as well.