adj.事与愿违的，适得其反的，弄巧成拙的

His paranoia about being judged was self-defeating, as it made him act in ways that pushed people away.
他对被评判的偏执是自我挫败的，因为它使他以一种把人们推开的方式行事。
Setting unrealistic goals can be self-defeating because you're likely to give up before you achieve them.
设定不切实际的目标可能是自我挫败的，因为你很可能在实现目标之前就放弃了。
The company's decision to cut costs by reducing quality was self-defeating in the long run, as it lost customers to competitors.
公司决定通过降低质量来削减成本从长远来看是自我挫败的，因为它失去了客户给竞争对手。
Her fear of failure was so strong that it became self-defeating, preventing her from taking any risks or trying new things.
她对失败的恐惧如此强烈，以至于它变成了自我挫败，阻止她承担任何风险或尝试新事物。
It's self-defeating to criticize someone for making mistakes when they're learning something new; it's better to offer constructive feedback.
当某人在学习新东西时批评他们犯错误是自我挫败的；最好是提供建设性的反馈。
The politician's attempt to cover up the scandal only made it worse and was ultimately self-defeating.
这位政治家试图掩盖丑闻只会让事情变得更糟，最终是自我挫败的。
It's self-defeating to work long hours without breaks, as this can lead to burnout and decreased productivity.
不休息地长时间工作是自我挫败的，因为这可能导致过度劳累和生产力下降。
The athlete's insistence on training through pain was self-defeating, as it led to an injury that kept her out of competition for months.
运动员坚持带伤训练是自我挫败的，因为它导致了受伤，让她几个月无法参加比赛。
It's self-defeating to avoid social situations because of shyness; the more you practice, the easier it becomes.
因为害羞而避免社交场合是自我挫败的；你练习得越多，就越容易应对。
The company's policy of not investing in employee development was self-defeating, as it led to high turnover and a lack of skilled workers.
公司不投资员工发展的政策是自我挫败的，因为它导致了高离职率和缺乏熟练工人。