Interesting thought-provoking movies still exist. They're just far away from regular people's comfort zone. I'll recommend you three post 2015 movies that will get you thinking:

Wandering (2022)

Everything Everywhere All at Once (2022)

Monster (2023)

But I'd concede that maybe making movies nowadays is harder because things are turning more and more expensive and there's too much pressure for producing profitable movies. So Art takes a back sit in movies that look for profit.