I m sorry I forgot to write common way to say　Did you want to poison me?＝あなたたちは私に毒をもりたかった。　this way we common to say in Japanese

I think word of "毒害”is not use in Japan may charge "弊害”、" 害”　”害悪”　or ”害毒”　may be nest is " 害毒”　I think . as you say so use "思う”　may drop this case but you need to change a little change "は”I/O "が” and "害毒”　I/O "毒害”and +word of "思う” will be "あなたたちはわたしを害毒とおもいました”　your sentence by other way" You are really hate me " nearest mean of sentence can I make. other one is correct Japanese. 　 becames " 　　

"あなたたちが私を毒害でした?" It doesn't make sense. If you want to say "Did you want to poison me?", you could say 私を毒殺したかったの？ or something. It depends on the context. It tasted like alcohol それはアルコール（or お酒）の味がした。 I hope my English makes sense.