A common myth is that "expensive is always better". A product's effectiveness relates not to price but to formulation quality, suitability for your skin type and being barrier-friendly. A simple, well-chosen routine can outperform a complex, expensive one.
A good basic routine has few products: gentle cleanser, barrier-supported moisturiser and sunscreen. These three form a solid base for most skin, with one or two targeted products added as needed. Investing in a few right products beats collecting dozens.
What matters is suitability and regular use. Misusing an expensive product or choosing one unsuited to your skin gives no result regardless of price. Consult a physician to build a sustainable routine suited to you.