Connection Issues

need some help getting my microtik to ping internet example trying to ping 8.8.8.8 and it gives me timeout errors. When doing a traceroute I only see my eth1 address 50.251.141.xxx when this should hit my gateway ip address.

Here is my setup:
50.251.141.161
255.255.255.248/29
50.251.141.166
75.75.75.75
8.8.8.8

local net:
10.10.75.1
255.255.255.0/24

I have mimic the other Mikrotiks we have setup by someone who is no longer with us, however for some reason I feel like I am missing something since I can ping 8.8.8.8 from those and access them via the public IP. Please tell me where I can look or if you can let me know what you need from me to assist me. I am stuck and new to MikroTik.