Ubuntu 22.04 does not boot on legacy system. Works only when used with Rufus

[Nav]

What I did:
Booting from Ubuntu 22.04, created with startup disk creator program of Ubuntu 16.04.

What happened:
The grub menu is shown. I selected "try or install Ubuntu". I can see a blinking cursor on the top left of the screen. The rest of the screen is blank. The cursor just keeps blinking. Nothing else happens.

Alternatives I tried:
I tried starting Ubuntu 22.04 in safe graphics mode, but that didn't work either. It was stuck at the blinking cursor. On Windows 8.1, I ran Rufus and wrote the Ubuntu 22.04 ISO onto the pen drive using Rufus. I also selected the MBR option instead of GPT, and selected the additional options of writing some extra partition that's necessary for legacy computer support.

Result of the alternative method with Rufus:
This time, after selecting "try or install Ubuntu", after around 30 or 40 seconds of cursor blinking, Ubuntu's orange icon was shown and Ubuntu was loaded. The installation of Ubuntu worked fine.

What needs to be fixed:
Please don't make us depend on a third party like Rufus. Not everyone is financially well off to keep buying new computers so often. Please provide built-in support for legacy systems within the Ubuntu 22.04 installer and all future Ubuntu versions for at least ten more years.

System details:
Hardware model: Gigabyte Technology Co., Ltd. GA-880GM-USB3
Processor: AMD® Fx(tm)-4100 quad-core processor × 4
RAM: 6GiB
Graphics: AMD® Rs880 (built into the motherboard)
OS: Ubuntu 22.04 LTS, 64-bit, gnome 42.0.
Windowing system: Wayland

Some more info:
Even the current Windows 10 ISO does not boot unless the option for selecting legacy support is enabled in Rufus. I tried writing the Windows ISO using Etcher in Ubuntu 16.04, but Etcher recommended using Rufus. I dearly hope the Linux, Mac and Windows communities come up with a better, more robust bootloader that "just-works". Sometimes, people like may want to install Ubuntu first and then install Windows for dual boot. But Windows has this sad monopoly of using the first partition.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: grub-common 2.06-2ubuntu7
ProcVersionSignature: Ubuntu 5.15.0-33.34-generic 5.15.30
Uname: Linux 5.15.0-33-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Fri Jun 3 14:46:37 2022
InstallationDate: Installed on 2022-06-01 (1 days ago)
InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
ProcEnviron:
 LANGUAGE=en_IN:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_IN
 SHELL=/bin/bash
RebootRequiredPkgs: Error: path contained symlinks.
SourcePackage: grub2
UpgradeStatus: No upgrade log present (probably fresh install)

ps: Thanks for all the nice upgrades in Ubuntu 22.04. I like using it.