for one's own good

for one's own good (not comparable)

1. To an excessive extent or degree, especially to the extent that it is negative, gets in the way, etc.

• Used in the construct too ... for one's own good.

• by half

• “too nice clever etc for your own good” in Longman Dictionary of Contemporary English, Longman.
• “for one’s own good”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.
• “too clever nice generous etc for your own good” (US) / “too clever nice generous etc for your own good” (UK) in Macmillan English Dictionary.
• “for your own good safety benefit etc” in Longman Dictionary of Contemporary English, Longman.