I can shape the chords happily enough.

The speed of the changes is what is holding me where I am in the progression.

I can do one change per bar if I set the metronome to about 70.

the other 3 beats allow me to make the change.

This is a measure and allows me to see some improvement.

Another is to choose 2 chords or maybe 2 chord changes. An easier one and maybe one you consider a bit more difficult.

Set a timer and count how many chord changes you make in one minute

count each chord as one.

To play songs you really need to be at around 60 changes/minute

On the easier ones I can do about 30-40

Others around 20-25

Again it allows you to see you are making progress

Then do some 3 chord progressions in the same vein.

Either to a metronome or timed.

We are making progress but it all feels so slow until as the songs we want to play are so far out of reach. Maybe stick to a couple of riffs so at least we are playing something recogniseable . It is possible to find some common riffs which can be played along one string. It's fun to hear a tune come from our guitars

Dave