It really doesn’t solve the building the thing problem either because without feedback from potential customers you probably have the building the wrong thing problem to some degree.
A devops tool is targeting businesses more than individuals. Talk to the relevant businesses and solve their actual problems.
Then ask the next person.
Cold calls are cattle not pets.
One way of gamification is to try to get 100 rejections per day. Most people are not your potential customers.
You could also try reddit subs. I'm not sure what quality you might get there.
I haven't looked into LinkedIn, but there might be a way to reach out on there.