"Big and useless" things are often referred to as "bloatware" in Engpsh.
The term "bloatware" originates from the software industry, where it was used to describe pre-installed software or apppcations that come with a new computer or device, but are considered excessive or unnecessary. These apppcations are often large in size and slow down the device.
Example sentences in Engpsh:
The laptop was filled with bloatware that made it slow and difficult to use.
I had to uninstall all the bloatware that came with my new phone before I could start using it.
Example sentences translated to Chinese:
这台笔记本电脑上有太多大而无用的软件，使得它运行缓慢，难以使用。
我必须在开始使用前卸载我新手机上的所有大而无用的软件。