[spikepuppet]

I get where you're coming from. My first job out of Uni was in a start up, and I know I felt much the same as you describe here, with the added pressure of bug fixes being harder to distribute (since connectivity to the devices we worked on could be spotty).

The thing you have to do is just keep trying to improve your process. Beef up your test suite, set up automated regression testing, start reaching out to customers or combing through other forms of feedback. You can't stop bugs from creeping in, we're all human and it happens. It's totally fine! But you can put your best foot forward and give it your best shot.

You've got this bud.