Translation of "Defeating" in Spanish

Plan’ – a strategy for  defeating Napoleon in Germany,  

', una estrategia para derrotar a Napoleón en Alemania,

That the Internet was defeating me and suppressing me.

que Internet estaba venciéndome y oprimiéndome.

Homosexuality seems to be a real self-defeating non-productive strategy.

la homosexualidad pareciera una estrategia contraproducente e improductiva.