Devs are one big red flag if many of them have a bad history.
Does anyone know of reliable sources that can provide unbiased overview of limitations and potential problems that a coin and their devteam is facing?
You have to gather every information that you can. Being unbias isn't in the term of many reviewers and you can only find them rarely that provides insights that are for the sake of the people. But most of them are only giving them biased reviews and thoughts about project whether they like it or not.
That's right, it's hard to trust developers who have a bad history, because why would you trust your capital in the project they're
going to do in the crypto space if they already have a bad background in their past?
It's a shame when you put or allocate funds to the project that they will promote in this field of cryptocurrency.
That's why you should really know how to do proper research on a project in reality.