Constructive ways to say you think something is a bad idea
englishwithkirsty.com
englishwithkirsty.com
In fact, you're basically duty bound to say it that directly if you really think that it's a bad idea. In a work environment, if it is found out that you thought something was a bad idea and you didn't say anything or said it so indirectly as to actually compliment it, you will lose reputation or get in trouble.
As a New Yorker living in Finland working with UK-based colleagues, there's a lot of code switching throughout my day.
(UK obviously is pretty different)