Thank you for clarifying, this router is the only one I have and it seems like creating a new subnet for raspberry is the better choice. Which will take me a day or two to report back. Though, the script I made worked as intended but at the end its breaks the DoH. But, will you please do the honor of reposting the awesome script that you just posted on this thread http://forum.mikrotik.com/t/script-fallback-script-for-dns-traffic-redirection-using-dhcp-server-without-nat-rules/148983/1
And, What is the preferred way for different subnet? I mean new bridge with a new dhcp on a specific port? If so, then
/ip route
add dst-address=192.168.188.2 gateway=bridge
/ip dhcp-server network
add address=192.168.88.0/24 dns-server=192.168.188.2 gateway=192.168.88.1
add address=192.168.188.2/32 dns-server=192.168.88.1 gateway=192.168.88.1
Then will this gateway in /ip route and dhcp server changes?
Will report back as soon as I moved the rpi to a new subnet.