“I felt left out” starts a conversation. “You left me out” starts a defense.

One version reports what happened in you, and the other assigns intent. The second one is often accurate and it still triggers a defense, because now the person has to argue about whether they are that kind of person instead of listening. Starting with your own experience gives them nothing to fight.

Rephrase the hard sentence before you say it, so it starts with how it landed on you. Then stop and let them respond, rather than stacking the next three examples.