1080P Quality in 1440P

I am unable to get 1440P quality out of my renders from 1080P source videos.
This is extremely upsetting. It seems I am unable to use good video editing software. I got here because my cheap software was malfunctioning.
Now I can't use DaVinci, Premiere looks horrible, Videopad fails to render.... it's f'ing ridiculous.
Here is the 1080P version:
Here is the 1440P version:
I have ensured both unlimited bitrate and auto, all to 1080P quality in 1440P. I have tried a higher bitrate through 4K export only to have the images all identical.
This is very unfair. It seems I cannot do ANYTHING anymore. There is literally no reason for this.
Please help. Thank you.
This is extremely upsetting. It seems I am unable to use good video editing software. I got here because my cheap software was malfunctioning.
Now I can't use DaVinci, Premiere looks horrible, Videopad fails to render.... it's f'ing ridiculous.
Here is the 1080P version:
Here is the 1440P version:
I have ensured both unlimited bitrate and auto, all to 1080P quality in 1440P. I have tried a higher bitrate through 4K export only to have the images all identical.
This is very unfair. It seems I cannot do ANYTHING anymore. There is literally no reason for this.
Please help. Thank you.