If you don't think there's something seriously rotten with 50+ companies selling "interview preparation" and all sorts of randoms selling you their get-into-Goo

If you don't think there's something seriously rotten with 50+ companies selling "interview preparation" and all sorts of randoms selling you their get-into-Google courses, books and Youtube videos, you're not really paying attention. You should take it as a sign that these parts of the industry are FUBAR and steer well clear. Herd thither, me hither. Stop copying what the pseuds are doing, come up with your own vision and follow it wherever it may lead. Assuming you're not fresh out of college and have plenty of experience (and skills to go with it), find a job that doesn't put you through this dumb grinder. Odds are it'll be a job you'll actually enjoy doing.