Patrick,
You claim to be a web developer first and a translator second, so, if you are going to be a translator, then you need to reorganize your profile and overview. There is nothing in your profile to suggest that French is your native language, although you have marked English and Spanish as fluent. You need to add French as "native/bilingual.
The job you are talking about was 2000 words which you did for $22.00 . . . (after charges and French tax, you will have received far less than $0.01 per word - head hits desk) . . . and so of course you got the sort of cheap client who would have found fault with your eyebrows let alone your translation. If it's any comfort, I think the client is a farmer.
That said - hard though this may be - is there anything in that feedback that may be true and that you could improve on? For example, "cooperation", "communication" etc.
You also need to hide all your below-average test scores even if you passed them. "Below average" means that there are countless freelancers who can offer the same skills as you and who achieved much, much higher scores (legitimately or not). That is not to say you are not a good translator, but you need to prove it. Your profile is sending out mixed messages.
The feedback will impact your JSS, but I think you will soon make it to top rated when you will be able to use the TR perk and have that feedback removed.
