Those guys aren't idiots, they are highly knowledgeable, experienced builders and the advise they gave you in the other thread is exactly correct. That 5400rpm drive is not a good choice. It will severely hamstring the performance of your system.
The rest of the build is fine, but that drive is not. This would be much better, whether you can afford it or not makes no difference on the fact that you will literally be installing a problem if you were to use that drive for the OS and game storage because it is so slow. Not only is it a HDD, but it is a SLOW hard drive.
This, would be much better. By MILES.
SSD for the Operating system. 3TB 7200rpm drive for game and personal file storage.
PCPartPicker Part List
CPU: AMD Ryzen 5 3600 3.6 GHz 6-Core Processor ($194.00 @ Amazon)
Motherboard: Gigabyte X570 AORUS ELITE WIFI ATX AM4 Motherboard ($209.99 @ Amazon)
Memory: G.Skill Trident Z RGB 16 GB (2 x 8 GB) DDR4-3600 Memory ($99.99 @ Newegg)
Storage: Crucial MX500 250 GB 2.5" Solid State Drive ($44.98 @ Amazon)
Storage: Seagate Barracuda 3 TB 3.5" 7200RPM Internal Hard Drive ($53.49 @ Amazon)
Video Card: MSI GeForce RTX 2060 6 GB GAMING Z Video Card ($369.99 @ Newegg)
Case: NZXT H500 ATX Mid Tower Case ($89.98 @ NZXT)
Power Supply: EVGA 650 W 80+ Gold Certified Semi-modular ATX Power Supply ($74.99 @ Newegg)
Operating System: Microsoft Windows 10 Home OEM 64-bit ($98.99 @ Amazon)
Total: $1236.40
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2019-11-06 03:16 EST-0500