Concerned about my husband's well-being after relocating to a Muslim country

Assalamu alaikum everyone. My husband and I have been married for a year and a half, and alhamdulillah we're expecting our first child around the end of this year. He moved to my country because he wanted to leave a non-Muslim environment and build our life in a Muslim land, which I deeply admire. In his home country, things were more comfortable for him-he earned more, understood the system, and generally felt more settled. We planned for him to start a business here, but subhanAllah, that hasn't worked out yet. Now he holds a senior position in my family's company, but I've noticed for months that he seems off. When I gently asked, he shared that work is really overwhelming. He finds it hard to manage people here-he deals with a lot of carelessness, delays, and a lack of responsibility, and it weighs heavily on him because he was raised with strong values of diligence and doing things right. He pours so much effort in, but feels it doesn't lead to improvement because those around him aren't receptive. I asked if going back would help, but he firmly said no-he's committed to raising our kids in a Muslim country. But as his wife, I'm truly worried. He looks exhausted, discouraged, and has been distant. I'm scared he might be heading toward depression. I want to support him without making him feel like his sacrifice was a mistake. How can I help a spouse who left so much for a life of faith, but seems to be struggling? Has anyone else gone through this after moving for marriage or religious reasons? Jazakum Allahu khairan for any advice.