By Paul Yeager, author of Literally, the Best Language Book Ever

The tendency to say simple things in complicated ways is so common that over-inflated language could be a blog on its own.

You might say:

There is a tendency among professionals to use an excess of superfluous verbiage in attempt to facilitate effective collaboration and dialogue among peers, supervisors, and valued customers when performing professional tasks and dealing with potential issues and concerns on a daily basis. The overarching goal is to manufacture an accurate image of their advanced intellectual capabilities; however, this stilted and inflated approach is counterproductive and surprisingly inefficient.

Or, you could simply say:

We use too many words and too many big words to try and prove how smart we are, and it doesn’t work.