The speaker sits at a family table, surrounded by people they call "stupid," and feels completely out of place. Everyone eats the same food, laughs too loudly, and tries to look impressive while jumping from topic to topic. The tone is irritated and sarcastic, and the speaker watches the scene like an outsider rather than joining in.
The sarcasm sharpens in the second half. Phrases like "marvelous pleasure" and "majestic words" are clearly mocking, and the odd label "intelligent important ignorant individuals" shows the speaker's frustration: these people act wise but, to the speaker, say nothing of value. Then the mood shifts. The speaker admits these were people they once thought they knew, and that the change may lie in themselves: "Maybe because you've changed." The ending is calmer and more hopeful. Instead of just complaining, the speaker accepts growing apart and says they have built "your own new place" to belong. It reads as a portrait of outgrowing the people you came from.