Ask HN: What big problems with Apache Kafka do you have?

Hey folks,

Me, with a bunch of friends, have some expertise in kafka ecosystem and wanna do something cool & open-source.

The thing is, we can't decide what to do. Like, let's say there are already some solutions for some problems, a lot of web/standalone UI clients out there. For example, I know managing connectors with k8s can be a problem and existing solutions (like confluent's) are not ideal, but not sure if that's really a big problem for most of people.

Please share your thoughts. Do you have any problems related to kafka ecosystem really bugging you? What could be done better?