Suggestion: Sympathize. Change can hurt. Every change has an attached emotion. (I’ve posted on these emotions previously.) Understand the emotional response part of change. It’s normal. The only real solution to this one is to provide clear communication, cast the vision well and be patient as people adapt. Most of these people will come along eventually.
Criticism is common in leadership and change. The only way to avoid it is to avoid change. I’m not sure that’s leadership, but that’s the only solution to be criticism-free. The fact is, the more change occurs and the more it becomes part of the culture, the less resistance there will be.
I should note, this post is not intended to help you avoid criticism, and certainly not completely dismiss it. As a leader, you must consider whether the criticism is valid, be open to other ideas and even rebuke if needed. Thinking all your ideas are great is an error in judgement and character. This post is intended to help you understand the basis of the objections. Even the best ideas will receive some.