Hi,
you can upgrade to Windows 11 without meeting the requirements by changing a few registry keys. You should find plenty of work arounds when you google it.
You could also keep using Windows 10 until 2025. By then, you should probably opt for buying a new PC.
If you want to completely ditch Microsoft, you can also switch to Linux, however you probably will get problems with that. (No Windows software, driver issues with NVidia cards, not a user friendly... But nice if you're looking for a challenge.)
Addition: To clarify WHY it doesn't work: Microsoft is beefing up security in Windows 11, making hardware security mandatory. This includes a modern CPU, with an fTPM integrated. These old chips (7th gen and older) may have the performance to run Windows 11, but have hardware security vulnerabilities that can't be patched by software. Examples for that are things like the Spectre and Meltdown malwares, and other malware that exploit specific vulnerabilities in the systems hardware. Since these are problems with the systems hardware, they can't be fixed by simply installing Updates or an antivirus.
Regards,
LightJack