monster PC one month old

This is a monster machine, regret purchase. Used one month, it works well, I just can not get used to ubuntu. Want to get back to mac now.

Corsair Vengeance RGB 32GB (2x16GB) DDR4 3000MHz C15 Desktop Memory,$313.99
CORSAIR Crystal 570X RGB Mid-Tower Case,$208.80
Samsung 970 EVO 1TB,$299.99
Enermax LIQTECH TR4 360mm AIO Liquid CPU Cooler,$149.99
MSI Gaming AMD Ryzen ThreadRipper DDR4,$379.99
AMD Ryzen Threadripper 1950X (16-core/32-thread) Desktop Processor, $799.00
ASUS Radeon RX 580 DirectX,$329.99
EVGA SuperNOVA 850 G3,$159.99

https://www.newegg.com/Product/Product.aspx?Item=N82E16817438092&nm_mc=TEMC-RMA-Approvel&cm_mmc=TEMC-RMA-Approvel-_-Content-_-text-_-
https://www.amazon.com/gp/product/B074DHQR9N/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B074Q45BNH/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B01LE0ZKR2/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B074ZLQZG2/ref=oh_aui_detailpage_o07_s01?ie=UTF8&psc=1
https://www.newegg.com/Product/Product.aspx?Item=N82E16814126199&nm_mc=TEMC-RMA-Approvel&cm_mmc=TEMC-RMA-Approvel-_-Content-_-text-_-
https://www.amazon.com/gp/product/B074DHQR9N/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B074CBH3R4/ref=oh_aui_detailpage_o02_s01?ie=UTF8&psc=1

The value adds up to $2644 pretax, I also have all insurances.