1 Kids are kids and always have, and likely always will, move fast unconcerned about others. They need training, of course. But that is part of our burden as adults - to train them properly.
2.Adults sometimes, particularly after daily Mass, may have to get to work, etc. They should certainly be respectful of those who cannot move quickly, etc. By the same token, those who are have the time to offer a post-Mass prayer of thanksgiving need to be considerate of those who need to leave. No one should be bowled-over. But if you are on the aisle and plan to stay you need to make room for those who need to leave, even if that means getting up going into the aisle and then getting back in the pew.
One solution I used to see a lot was for a person to genuflect at the end of the pew rather than in the aisle. Haven’t really seen that in years, but it makes a certain amount of sense when the aisle is jammed.
In short - manners - being polite - is the answer for adults. Proper training in consideration of others (i.e. manners) is the answer for children.
And when rudeness is endemic, try to be polite yourself as it’s got to start somewhere.