support gems are terribly limited, no way to know which will work with which skill!

It is so frustrating to create support gems, only to see they will not work in most of the skills I want them to.

Example: Physical Mastery (+1 to lvl of supported Physical skills)

On my monk, I cannot use it in ANY of my melee skills, none! Why?? How come I can't place that gem in one of my Buff skills, and thus, give all my melee skills this buff?

So many things are incredibly frustrating, because until you make that support gem, you have no way to know which skills they will work in. I shouldn't require a 3rd party site that is testing them and writing up their findings, this should be something in game that gives us a list of skills each support gem works with.

Why are we limited to only using 1 support gem for ALL of our skills? I can't use multiple dmg ones, or speed ones, or enhancements... why??

I really thought / hoped POE 2 was going to do something great, but all I am seeing is a complete dumbing down of POE 1, making you only be able to choose from a few builds that everyone else are going to be using for every class.

Very true, there has been 2-3 times I have made a toon and got to level 15 without having 1 support gem drop. Without support gems early your game feels lacking.

And the fact that they do not work with other certain skills kind of blows.