Many "1080p" torrents are actually upscaled 720p files with poor bitrate or "hard-coded" subtitles that you cannot turn off. 📺 Best Ways to Watch in 1080p
You can find the full OVA collection in high definition on the following official platforms: attack on titan ova 1080p torrent
If you run into trouble finding a specific OVA or want to confirm quality, let me know and I can give general tips for identifying clean 1080p sources without linking to infringing content. Many "1080p" torrents are actually upscaled 720p files
You can watch the full collection of OVAs legally in 1080p through the following: Streaming Services attack on titan ova 1080p torrent