You dont need dnsmasq anymore as its embedded into the pihole-FTL binary already.
Make sure its removed or disabled:
sudo systemctl disable dnsmasq
sudo systemctl stop dnsmasq
sudo systemctl restart pihole-FTL
Can you SSH into the IP from remote PC now ?
Whats output for below ones ?
sudo brctl show
ip l
ip a
ip r
If you compare my netstat with yours, you can see pihole-FTL is not listening to IPv4 ports 53 TCP or UDP for DNS.
Most of the times this is caused by rogue config file(s).
What config files do you have ?
sudo grep -v '^#\|^$' -R /etc/dnsmasq.* | sort
Below how mine looks like:
pi@noads:~ $ sudo grep -v '^#\|^$' -R /etc/dnsmasq.* | sort
/etc/dnsmasq.conf:conf-dir=/etc/dnsmasq.d
/etc/dnsmasq.conf.dpkg-old:conf-dir=/etc/dnsmasq.d
/etc/dnsmasq.conf.old:conf-dir=/etc/dnsmasq.d
/etc/dnsmasq.d/01-pihole.conf:addn-hosts=/etc/pihole/black.list
/etc/dnsmasq.d/01-pihole.conf:addn-hosts=/etc/pihole/gravity.list
/etc/dnsmasq.d/01-pihole.conf:addn-hosts=/etc/pihole/local.list
/etc/dnsmasq.d/01-pihole.conf:bogus-priv
/etc/dnsmasq.d/01-pihole.conf:cache-size=10000
/etc/dnsmasq.d/01-pihole.conf:dhcp-ignore-names=tag:wpad-ignore
/etc/dnsmasq.d/01-pihole.conf:dhcp-name-match=set:wpad-ignore,wpad
/etc/dnsmasq.d/01-pihole.conf:domain-needed
/etc/dnsmasq.d/01-pihole.conf:interface=eth0
/etc/dnsmasq.d/01-pihole.conf:localise-queries
/etc/dnsmasq.d/01-pihole.conf:local-ttl=2
/etc/dnsmasq.d/01-pihole.conf:log-async
/etc/dnsmasq.d/01-pihole.conf:log-facility=/var/log/pihole.log
/etc/dnsmasq.d/01-pihole.conf:log-queries
/etc/dnsmasq.d/01-pihole.conf:no-resolv
/etc/dnsmasq.d/01-pihole.conf:server=149.112.112.10
/etc/dnsmasq.d/01-pihole.conf:server=9.9.9.10