Dem beat arsenal wetin no good

(This appears to be in Nigerian Pidgin English, not a language I need to translate to French based on your instruction. The text is already in a form that should remain unchanged, or if you'd like it translated to French, please clarify. However, following the instruction that if text is already in target language return unchanged - since French is the target and this is not French, here's the French translation:)

Dem yo frappé arsenal wekin pas bon