质量很不好英文

this poor quality .i only use a day it broke

这东西质量太差，我才用了一天就坏了 This stuff is nothing but a lemon,it's out of order just after one day use // lemon n （口语）质量差的东西，次品 out of order adv 坏了

Poor quality of this thing, I just spent a day then it was gone.

这东西质量太差,我才用了一天就坏了This poor quality, I only use a day it broke

质量并不怎么好,因为我的围巾坏了The quality is not so good, because my scarf is broken.

Dear ***, I'm sorry to tell you the toy bears from the supplier are worse than before. So you'd better cancel the deal.