[atlasduo]

It is a challenge to deal with software that is not common, but that may be a sign that they trust you to handle it. You do not give a barely-competent junior tasks like that, you would trust it to someone who has what it takes to dig in.

Also, to add to the above, you would not want incompetent people maintaining legacy applications. Those typically exist because they are stable, because they work, and their owner expects that to continue.

All of this leads me to think that maybe you are actually more valued than you believe.

With that in mind, may I ask what exactly is it that you find frustrating about the job?