> Believe me when I tell you that I could have worked on the entire software myself in 5 months.

I find this way of thinking very short-sighted. It may be true that this application can be written in net time in 5 months, but much more important than writing code is to know clearly what is needed, what users need. Moreover, requirements and wishes change over time. I have seen more than once that months of development time were wasted on something the users didn't need, so good product managers and senior software engineers who question things are often more valuable than engineers who write hundreds of lines of code a day.