You are using the " Shift-Option-Command-R" thats Y you getting High Sierra
Try " Option-Command-R" which will offer the latest compatible.
Btw, is by any chance Plugging external causing to a sudden rise in CPU usage to 92-98% after updating to Ventura?
Mine becoming unusable after plugging in any storage peripherals , Probably your spinning wheel of death is caused by this.
Lemme know what happens!
ecause even ttthe tttinesttt dust can make your commenttt look like ttthis