There are several problems with the design

[pixarincparr]

Hello

1. The filter is missing a component frame and also has some strange artifact next to it.

Before

After

2. A ghost or poorly visible outline. This problem occurs in all parts of the program. It's not just a poorly visible line; it's broken in multiple places, and the breaks occur in different places in different parts of the program.

3. The text is too close to the checkboxes.

The question is, should there be a checkbox? In some places there is, in others there isn't. Is it a bug or a feature?

[MahdiMirzadeh]

I have moved away from qbittorrent client a while back that's why I might not be catching this bad UI/UX

About your 3rd issue regarding empty boxes with no visible "check", it's a bug, it's supposed to be check boxes

It should look something like this:

I'll check these issues in a few days (or weeks)