Nighthawk AC1900 (R7000) Slow WiFi Download Speeds

Hello Everyone,

First post here however I am at my wits ends with this router. So I bought this router based on all the great feedback and based on recommendations from cable guy. For weeks it appears my network is slower than advertised (300 mbps). I ran a speed test seveal times on wifi with results from about 8- 35mbps max. Connected I can sometime get 250mbps however I paid for a good router and expect it to work. Based on the posts here is what I tried:

Ping test to determine optimal DNS package size

Adjusted MTU to - 1340

Entered custom server locations for DNS

Changed wires

Factory reset (multiple x's)

Downgraded firmware (R7000-V1.0.7.12_1.2) - Can someone explain why new firmware would be made to slow down router?

Every type of power reset I could find

Adjusted channels

Also just about anything other I could find on this board.

Trying to log into router to troubleshoot both wired and wireless is also excuriating slow making simple updates take over 1 hour

Tips? Also including configs below:

Description . . . . . . . . . . . : Intel(R) Dual Band Wireless-AC 7260
Physical Address. . . . . . . . . : 7C-5C-F8-28-BF-F9
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::812:4648:a269:4ce6%12(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.4(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Thursday, January 11, 2018 8:56:48 AM
Lease Expires . . . . . . . . . . : Friday, January 12, 2018 8:56:48 AM
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DHCPv6 IAID . . . . . . . . . . . : 92036344
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-1D-9E-05-04-08-62-66-B7-B7-E7
DNS Servers . . . . . . . . . . . : 209.222.18.222
209.222.18.218
NetBIOS over Tcpip. . . . . . . . : Enabled

Downgraded firmware to