You are in deep confusion
For a comparison - other OEM's BIOS releases:
Gigabyte X570 AORUS ULTRA (rev. 1.0) - Date: 22.1.2021 - version F33a Update AMD AGESA ComboV2 1.2.0.0 https://www.gigabyte.com/Motherboard/X570-AORUS-ULTRA-rev-10/support#support-dl-bios
Asus ROG Crosshair VIII Hero - Date: 14.1.2021 - version 3202
1. Update AMD AM4 AGESA V2 PI 1.2.0.0
2. This Beta BIOS can only be reversed by BIOS Flashback https://rog.asus.com/motherboards/rog-crosshair/rog-crosshair-viii-hero-model/helpdesk_bios/
ASRock X570 Taichi - Date: 8.12.2021 - version 3.80 Update AMD AGESA Combo-AM4 V2 1.1.0.0 patch D http://www.asrock.com/mb/AMD/X570 Taichi/#BIOS
All of them better than MSI's support here:
Date: 4.1.2021 - version 1.53 Update to ComboAM4PIV2 1.1.9.0
Very selective perspective there... Gigabyte Ultra is the second or third top x570 board from Gigabyte, the CH8 is the top Asus board and the Taichi is the top ASRock board... making an equal comparison, MSI have released AGESA 1.2.0.0 BIOS updates for all THREE of their MEG boards, so I don't think you can say MSI is trash compared to the other companies. I'm sure they are now working on the MAG boards.