[neves]

Sure you need to improve your software engineering practices. Take a look of your version control, deploy process and automatic tests. The increase of your QA team is probably a bad smell. Remember the old quote: "You can't test quality into a product".

But also pay attention to your company culture. A "blame culture" is one of the worst enemies of good software/product. If your management work by making people feel guilty, you can't have candid conversations about your problems. You'll never find what you need to fix, because you won't be able to discover the real problems.

I've worked in a company where the "blame game" mode were always on. It was terrible. People didn't want to fix a problem, just pass it to the next guy. You'd never find the original cause of problems or have your management invest to solve it.

If you have a culture problem, don't let your employer make you feel bad. Take care of your mental health. A job change may be the best option.