I've arrived at this conclusion in my mind regarding trip sharing or trip rating services - though for slightly different reasons.
Once someone creates a self-hosted, WordPress-like, trip sharing software, I'd be all over it. Like my blog, I'd like to know that my time spent writing and uploading photos is going to last longer than the typical lifespan of a startup.
Not wordpress, but currently building a digital travel journal in which you can share trips like this https://esplor.io/trips/k8g96my2j4vnm (press see timeline for the diary view)
Based on what you said, you seem like the user we would target. Any feedback would be brilliant!
Here, that's a reason for having very low trust for travel planers. They want to bring you sideways. You're the product.