Never be so self-indulgent.

切莫宽纵自己。

《新英汉大辞典》

I told her to stop being lazy, cowardly, self-indulgent and pathetic.

我告诉她抛开懒惰，懦弱，停止放任自己和扮可怜相。

youdao

If only there was some short, shallow, self-indulgent way to express my horror.

如果有什么简短的、浅显的、自恋的方式让我表达我的恐惧就好了。

youdao

Perpetual rebels tend to be discounted as "usual suspects" and regarded as self indulgent wreckers by their colleagues.

BBC: When MPs must choose between conscience and party

Aberconwy MP Guto Bebb called it a "self indulgent debate" and an excuse to have "an attack on government".

BBC: 'Cost of living crisis' forcing more to use food banks

Roll with it: Babies born between 1948 and 1964 entered an age of such stability that they have subsequently been described by some as self indulgent.

BBC: Have young people never had it so bad?