with all due respect

used to begin a statement that may disagree with or criticize someone while still being polite

With all due respect, I have a different opinion on how to approach this project.
With all due respect, I don't think your proposal addresses the main concerns raised in the meeting.
With all due respect, I feel that your statement oversimplifies a complex issue.
With all due respect, I question whether this strategy aligns with our long-term goals.
With all due respect, I think we should reconsider our position on this matter.