I would just like to note that the developers of mods don't get paid and usually have limited time because they also have real-life matters like a job and/or study.
So cursing at them because they didn't do what you said or whatever else you feel unhappy about seems a bit misplaced. Instead you could congratulate them with what has been done and improved. Of course you are allowed to give criticism, but remember that we do this out of free will. So it might just be a little bit more likely for things to happen if you would approach it in a more constructive and positive way.
And of course there is also always the option to offer your help as well. Like I said, time and manpower is limited.