Anything made by Buck. The Vantage Force Pro is a terrible knife if you use a knife for a living. My 119 snapped in two, and my old 110 was a damn rattlesnake after just a few outings. I also had a Buck Stridee folder that was hard to open, had a paper thin liner that wore out in literally weeks, and just all around felt cheap.
Boker. All of them.
CRKT M16. The thing literally fell apart.
Spyderco Delica. Holy cow. Had I not sent it in for warranty I would have swore it was a knock off. No good blade deserves such a terrible and cheap handle/lock system. The FRN has to be the cheesiest feeling knife handle I've held in my life. The Sypyderco hole was cool in the 90's, but to me it takes too much effort and still opens slow. While I called out my Delica, I just can't stand Spyderco's hole, nor their semi wharncliffe with a big butt grinds.
Kershaw Blur. I like KAI, but the Blur is one of the most over rated knives ever made. Not to say it's bad, but it's not as good as many people spin it to be.
yes yes release your anger.