computer feels laggy running linux but okay with windows 10 don’t know why?

Processor AMD A8-6600K APU with Radeon(tm) HD Graphics 3.90 GHz
Installed RAM 8.00 GB (7.20 GB usable)
System type 64-bit operating system, x64-based processor
Pen and touch No pen or touch input is available for this display

this is my computers specification. now my question is when run windows 10 on my computer it is literally faster than running linux (arch base, debian base tried). i don’t know why does it happen but it really troubles me cause i know linux should run faster on my pcas it consumes less ram and moreover the desktop is blurry too in Linux rather than Windows.