Satisfaction with oneself or one's achievements; complacency or smugness.
彼は自己満足して改善点を探そうとしない。
He is complacent and doesn't try to look for points to improve.
自己満足に陥らないためには、他人の意見を聞くことが大切だ。
To avoid complacency, it's important to listen to others' opinions.
そのコメントは自己満足的で、読者の立場を考えていない。
That comment is self-satisfied and doesn't consider the reader's perspective.