I read that it’s to avoid internal competition.
A Chinese company manufactures a product (or parts of it) for a Western brand with high quality control standards.
Half the production output meets the standard and is sold under the Western brand name for a higher price.
The other half is sold much cheaper, with a brand name that sounds unappealing to Western customers but can still be sold to Asian markets or people who don’t care and only look at the price.

So the English name sounds bad on purpose to steer Western buyers towards the more expensive brand with a higher profit margin.