They hate me.
However, I practice them sometimes, and usually they get better. My bridge used to be non-existent, and now I can see the light at the end of the tunnel that is @human.mvmnt .
Apply strength training principles to each individual joint, specific to the range you're trying to improve.
In other words, use isometrics on both sides of the joint, working up to HIGH effort contractions, and over time, increase the range.
Then, come back to your movement, and see if it got better. Probably did.