I don’t quite agree with this.
GLS Scanlines is CRT-Guest’s implementation and is extremely flexible. If you think the image looks blurry maybe you can try a higher Scanline Type for example 1 or 2. Darker scanlines tend to sharpen the image.
You can also customize the look and shape of the scanlines as well.
As for Fake Scanlines, that’s an HSM implementation.
It can be used as an effect to add scanlines in cases where you normally won’t see scanlines for example in high res interlaced content.
It’s more artistic than accurate. You can even set it to any number of scanlines (within its range) without regard for the resolution of the image. That’s not how scanlines work though.
It also didn’t curve with the screen although, I think recent implementations have added curvature. Also recent implementations have added the ability for the scanlines to be calculated based on the number of vertical pixels so you get a more realistic number of scanlines.
However if curvature is off on these Fake Scanlines but Screen Curvature is On, there will be misalignment of the scanlines on the graphics.
Also, if an arbitrary number of scanlines is chosen there will also be misalignment of the scanlines on the graphics.