The performance of pins depends on the niche and the content.
Your problem might be that you do not package your content in a way to engage the audience. You might want to reconsider whether your pins are simply nice to look at and to save or whether they really make your target group click on them.
Therefore, we recommend using A/B testing to improve your pins. You can try to adapt e.g. the pin title, background color, font, picture quality, and more. However, always make sure to test only one thing at a time and to wait at least 1 to 2 weeks to gather data on the results.
When optimizing your pin design does not improve your clicks, the second step is to optimize your content.