I don't like langchain that much either. It's not as bad as LLAmaIndex and Haystack in regards to extreme overengineering and overabstracting but it still is bad. The reason I still use Langchain is that often times I need to be able to swap out LLM service providers, embedding models and so on for clients. Thats really the only part about langchain that really works well.

Btw. you don't have to actually chain langchain entities. You can use all of them directly. That makes the magic framework code issue much more tolerably as Langchain turns from a framework into a library.