play by one's own rules
US /pleɪ baɪ wʌnz oʊn ruːlz/
UK /pleɪ baɪ wʌnz oʊn ruːlz/

1.
按自己的規矩來, 我行我素
to act according to one's own standards or principles, rather than those generally accepted or imposed by others
:
•
She always preferred to play by her own rules, even if it meant facing challenges alone.
她總是喜歡按自己的規矩來,即使這意味著獨自面對挑戰。
•
The new CEO decided to play by his own rules and implemented radical changes.
新任首席執行官決定按自己的規矩來,並實施了徹底的改革。