Always squashing is a terrible idea. Where I work are some that insist in doing that, and already dozens of times we have los valuable information. Let me quasi-cite somebody with some knowledge about git:

Linus Torvalds generally prefers not to squash commits when merging pull requests into the Linux kernel, especially when the individual commits have valuable information or context. He believes that squashing can discard useful history and make it harder to understand the evolution of the code. However, he also acknowledges that squashing can be useful in certain situations, such as when dealing with a large number of commits that are not relevant to the main development history