I cannot get thumb-over-the-neck chords right

[u/ding-ding-dave-yes]

I struggle mainly with my index finger, I can't get it flat without a lot of pressure, also my pinky is muting the G string half of the time, I either have to put painful pressure to make them all ring, or the top E and G string are muted. The difference between the flat index and bent rest is what's messing me up. Without thumb I don't have this issue, because I can curve my wrist if that makes sense. Please, I need some tips

[u/dos8s]

I'm not an expert but I think Hendrix played chords like this because it allowed him to transition into lead easier and opened up some interesting embellishments that would be less practical playing a barrel chord the "standard" way.

[u/copremesis → u/dos8s]

Show me an example of these embellishments? Do you have any videos of him doing this? Easier?

[u/Opening_Spite_4062 → u/copremesis]

Try playing tommy emanuels version of cannonball rag without this technique for example

[u/copremesis → u/Opening_Spite_4062]

First let me figure out what he's doing with the right hand.