How to forward TCP traffic to pod from the outside world

Question

Hi,
First of all, I am new to Kubernetes and for past couple of days I am struggling with something I would expect to be a simple task.

I want to forward TCP on specific port(s) to a running pod. As a reference I take a look here. With minikube locally, it works as expected (apart wrong namespace in tutorial document: should be kube-system).

However, after 3 days of trying to achieve the same on AKS my frustration only get bigger and bigger and I am on the verge of hating Kubernetes before I even starting to use it. Can someone please explain me in plain English how to expose TCP ports using Nginx ingress to outside world.

What I try so far is basically as follows:

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v0.44.0/deploy/static/provider/cloud/deploy.yaml
kubectl apply -f redis-deployment.yaml
kubectl apply -f redis-service.yaml
kubectl patch configmap tcp-services -n ingress-nginx --patch '{"data":{"6379":"default/redis-service:6379"}}'
kubectl -n ingress-nginx patch service ingress-nginx-controller -p '{"spec": {"ports": [{"name":"http","port":80,"protocol":"TCP","targetPort":"http"},{"name":"https","port":443,"protocol":"TCP","targetPort":"https"},{"name":"redis","port":6379,"protocol":"TCP","targetPort": 6379}]}}'

But I can't access from the outside and I don't see 6379 port in ingress-nginx-controller listed. Looks I am missing something, but I cant see what.

I find Kubernetes extremely complicated so far. Docker & compose are much cleaner and their docs are way much better.