Good grief. If every instance of voicing of what can be done differently in an alliance belongs in some twisted definition of "infighting" then only bad alliances, lead by the tyrannical leaders, would be free from it. However no normal person, save perchance those trying desperately to save face, would call voicing a unified displeasure as "infighting".
As far as reputation, I go less on what people say and more on what I see. For example when I told you that you were wrong about infighting, rather than recant, amend, or recall your statement, you preferred to continue your own untruthful narrative that suits you regardless of the validity. You essentially doubled down on the lie, possibly out of pride or whatever that motivates you.
There is no angle on this where you are a honest person that I can see. You certainly don't represent your alliance very well.