Cruz has stepped up and supported Trump and the rest of us when he needed to.
.
Not exactly.
Back in August of 2017, Trump was going to fire Sessions and fill the AG spot via Recess Appointment. In order to block President Trump from replacing Sessions while they were on break and without their "approval", they had to have a unanimous vote, 100-0 in order to stop Trump from repacing Session without Senate Confirmation.
As a result, Trump and America had to put up with Sessions hiding under his desk for another year, two years+ of Robert Mueller and Rod Rosenstein..
Cruz had an opportunity to stand with the President and vote NO allowing for a Recess appointment . instead he stood with the establishment.