As somebody else said already, you care too much. It's not your fault things are progressing slowly. As the stoic quote says, you have only power over your mind, not outside events, like how qualified the dev team or management is. I guess you could suggest some more training for the team, though the impact of that would mostly depend on their attitude towards learning new things, which again is outside your control.

I would just treat the job as a source of paycheck while looking for something better. There are lots of people working jobs like that in slow-moving organizations, most simply don't care as long as they are paid. It's best to find meaning to life from somewhere outside work, such as hobbies.

Coming from Finland, the #1 in EU unemployment rate, I've slowly learned to be happy of the fact I have a job at all.