I think you're putting words in people's mouths there, mate. I don't think anyone on here has said he's the worst keeper ever and a disgrace to the club. People are just frustrated because it's been clear to many of us that Howard has been poor or, at best, below average for the past 18 months.
It's not Howard's fault that Martinez keeps picking him. The fault lies squarely with Martinez for not addressing the problem last summer and signing a better keeper. I don't think Robles is the long term answer, but I personally would be picking him ahead of Howard, at the moment.