The WEBRip 1080p is not from good quality, low resolution pixels and/or low bitrate. If you streaming Full HD or UHD content with a slow internet connection. What's not the reason, because other UHD HDR10+/Dolby Vision content on Plex, Netflix, Prime Video,...looking perfect sharp, whit perfect black and vivid colors. Also the sound is very poor. It's like a cam-rip from a cinema. And there'r even English and Dutch subs, but I'll waiting for a file with better quality overall.
The audio weakens.