An argument over something that is not important. (Cambridge Dictionary)
A noisy altercation or quarrel usually over petty matters. (Merriam – Webster)
To quarrel noisily and usually over petty matters. (Merriam – Webster)
To engage in a petty quarrel. (Dictionary.com)
Petty quarrelling. (Collins Dictionary)
If your employees are squabbling your company’s probably standing still.
Confusion and squabbling undermine Trump’s steps forward on the world stage.
Centuries of pondering — and squabbling about — trees.