Just got a code to work where guys used Hungarian Notation... What do you guys think of this?

I'm writing a guide to help non-tech (like plp with startup ideas) people hire developers. What I can't miss in this guide? What do you think about it?

I just got myself working with the worst developers I could ever know, they don't know nothing about dry, kiss principles... They built an entire platform using Zend framework but they don't used mvc layers right and there is no backend validation most of the time, besides many other true newbie developer problems. I just came to this job and from and Rb/Python background and I can't live with this piece of code. They have 20+ years in the market while I'm just a guy with 5 or 6 years. What should I do if I can't convince the startup owners they are bad as hell waste of money?