I had exactly same problem.
It seems that replacing Inter font with Ubuntu Regular font make things a little better. Also today there is system update in AppCentre which maybe brings some improvements. Please check it out.
I also tried to find beforementioned discussion on this topic at Reddit. This problem is described in rather long post reviewing cons of ...
There is a discussion on Reddit about that. It seems that on some displays the font looks ugly but apparently not on all displays and not all font types.
I've noticed this problem immediately after installation, replacing Hera with Odin on the same computer, the font is just rendered badly.
Cassidy mentioned that they are looking into this.
This worked for me for the installation issue:
Boot the installer in EFI mode not legacy-BIOS mode.
It's Settings->System->Enable EFI (special OSes only).
Try install grub-customizer
linux /boot/vmlinuz-5.11.0-25-generic root=/dev/mapper/data-root ro quiet splash video=hiperv_fb:1920x1080 $vt_handoff
linux /boot/vmlinuz-5.11.0-25-generic root=/dev/mapper/data-root ro quiet splash $vt_handoff video=hiperv_fb:1920x1080
the problem is $vt_handoff you need video=hiperv_fb:1920x1080 in last part of ...