Blocky Quality with proper Bitrate?

[Chrionz]

So, pulling my hair out a bit. I have a dual PC setup with an HD60 Pro in the streaming PC. Along with 16gb of Ram, i7 6700k, and a 1660 TI. I use Nvenc as it seems that is what is best for streaming on these days and I stream at 720p 60fps. Nvenc settings are:
Max Quality
5k bitrate
High profile
look-ahead off
Psycho Visual Tuning on
Max-B Frames = 2.

No matter what I do, I get a blocky stream on Twitch, you can check it out on any of my VODs here. I really don't know what to do as other people have lesser bitrates and a better outcome on the same game.

(Log File: https://obsproject.com/logs/6AGsj_Y1tUPlTQ7H )

Edit: Also, game capture looks crystal clear in OBS preview, so it's not that.

 

[qhobbes]

Try changing the downscale filter to bicubic.

Which downscale filter to use?

Use case: typically gaming Specs: not relevant, this is the OBS setup for the most capable machines Trying to figure out wether to use Bicubic vs Lanczos, heard that Lanczos is just unnecessary stress on the system but it has a higher sample count (not going to pretend I know what that means)...

obsproject.com