This is because that we tend to set the bar too high and want everything to be perfect.

这是因为我们常常给自己制定一个过高的标准，事事追求完美。

youdao

Children with the disorder may be overly conforming, perfectionist, and unsure of themselves and tend to redo tasks because of excessive dissatisfaction with less-than-perfect performance.

有该障碍的儿童可能过度遵守纪律，是完美主义者，对自己不确定，倾向于对不完美表现过度不满而一再返工。

youdao

You're not perfect, and you tend to be hard on yourself because of it.

你不是完美的，你往往是对自己最大努力，因为它。

youdao

Private loans, which have been affected by the credit crunch and are becoming harder to secure anyway, tend to be more expensive for students with less than perfect credit ratings, and riskier than federal loans.

FORBES: Money & Investing

If the fuels were perfect substitutes, oil prices would thus tend to be about 6 times natural gas prices.

FORBES: Oil And Natural Gas Prices Get Divorced

Yet the system is far from perfect: though Estonian institutions set up from scratch do indeed tend to be ultra-efficient, those inherited from Soviet days like the xenophobic immigration authority are anything but.

ECONOMIST: Estonia and Slovenia