“Why are we not hearing about the misdirection, intentional weakness and even deceit in Joe’s most recent border action loud and clear 24/7 from R members of congress, instead of just on pages such as this and conservative radio?”
Because most of the Rs and their donors are all for open borders.
That, sadly, is one of the top three answers; including a lack of leadership, they are intimidated, coerced or bought off - or some blend of all.
A handful may briefly appear in opposition publicly, but that is often lip service that doesn't meaningfully represent to the entire body.