malveillant, méchant
Tu es malveillant.
At least let him finish his meal, you malicious apes.
Laissez-le au moins finir son repas, bande de singes malveillants.
— The Personal History of David Copperfield (2019)
Such things are often accidental rather than malicious.
De tels incidents sont souvent accidentels plutôt que malveillants.