> No one is responding any questions
People do answer questions. Your (and other) questions have been answered within less than 24 hours on a business day. What else do you expect?
> The wiki is VERY confusing, badly written, and it is lacking a lot of important informations
The wiki is maintained by volunteers and open for everyone to contribute to. If you find information being out of date, you are very welcome to improve it:
https://github.com/IntellectualSites/plotsquared-documentation
> There are many issues that are not resolved and authors seems to not care about it
Issues are resolved whenever someone has the time to work on them. This is an open source project, powered by the community. There's no big team working on it full time.
All contributions happen in so-called "free" time, parallel to other jobs people have.
> just a reminder it is a 20$ paid plugin XD
Precompiled binaries are sold for €15, equal to $15.48 with the current exchange rate.