Recent upgrade from window 10 to 11 with incompatible processor

[Alexa46]

I recently installed windows 11 because i felt forced because Microsoft is closing windows 10 in october and I was perfectly happy with windows 10. I had this computer since 2016 or 2017 so yes its old, I was able to install window 11 perfectly fine until I noticed, chrome was slow, videos kept lagging, The hibernate/sleep option was completely gone along with the brightness setting. I went days going through many tutorials and found out my graphic driver ( AMD High-Definition (HD) Graphics Driver  16.101.1701.1001 Rev.A ) No longer works and I had go to Windows basic display adaptor. The brightness setting came back but no changes. I tried reinstalling the driver but it didnt work.
Why this brand of computer only has one driver that doesnt even support windows 11? 
This company seriously needs a driver that can work on old computers like mine to support windows 11 since Microsoft is forcing everyone to get windows 11 since windows 10 will be closing and I cannot afford for a computer
Is there a way to have a graphic driver that supports my computer or am I completely  dead? 

[banhien]

@Alexa46 

All hardware and software vendors will do the same: they support their products up to a number of years. That is their business they can NOT spend time and money to support their products forever.

Hope this makes sense.

Regards.

[Alexa46]

Yeah, i understand thanks...