Be humble enough to admit you may be wrong
You might be, right? Unless it’s a clearly spelled out biblical principle, then it is subject to interpretation. Yours might be right or it might be wrong. The willingness to admit this fact will go a long way toward your criticism being considered and valued.
Take the personal preference test
Check your heart for why you are sharing the criticism in the first place. Before you offer the criticism, ask yourself if you are really offering this criticism for the good of everyone or if this is simply a personal preference. It’s OK either way, but be honest enough with yourself and others to admit it. In fact, if you do this test appropriately, some of the criticism you think you need to offer you may decide you don’t need to offer after all. The less you are seen as offering criticism that only benefits you, the better what you do offer will be received as constructive criticism.
Do you want constructive criticism to be heard? These are simply some suggestions to hopefully help.