Look at it from the standpoint that you're no longer to support this company's bad habit(s) and less like you're abandoning the team. I left a similar situatio

Look at it from the standpoint that you're no longer to support this company's bad habit(s) and less like you're abandoning the team. I left a similar situation 12 years ago and it was the best decision I ever made and no one blamed me for leaving. A year later the company laid off all the developers - and it wasn't even a startup, they just decided to stop building software because it wasn't their core competency.