Are those your own blurays? Then share them before compressing.
Transcoding is hard. There is no way that your transcoding settings are going to be a one size fits all. I am currently encoding the famous iKaos Dragonball release and I did 48 samples before deciding what configuration to use.
You are better off downloading stuff from torrent, especially for newer media. You’ll find a community that put 100x your time collectively on transcoding. That will also save from your tremendous electricity costs.
Also look into vmaf for quality metrics. Consider that switching to uncompressed 1080 might bring you close to your goal with very very low effort.