"Mgr, I've got some concerns about our code quality. We seem to be prioritizing velocity over quality, and paying for it - X% of our sprints are spent fixing bugs introduced by what we shipped the previous sprint, instead of adding new features. Slowing down will actually increase the speed at which we can ship features, and make us look better to the higher ups as well."
Remember when interviewing, don't just shit all over your current job - phrase that well, too. "I'm looking for a place with a more mature software development philosophy, with a higher focus on QA than my team currently has."
Does your team have a manager, a project manager, and/or a tech lead? And do you feel like you can trust them to take criticism and not retaliate?
If so, raise your concerns with them.
If the answer to any of those questions is no, you have two options:
1. Step up and try to lead the team to a better place.
2. Get a different job at a better place.