The reason he hates Cruz is very simple. Cruz went maverick and got the government shut down while Boehner was trying to work out a compromise, and then after it was all set and done indicated his willingness to do it again. He did this because he wanted the ACA repealed. http://swampland.time.com/2013/10/17/heres-what-the-government-shutdown-cost-the-economy/
That is how much he cost our government because he didn't like one bill.
It's one thing to argue against a bill after its passing passionately. It's part of our process, and on occasion, yes, bills do get repealed. What Cruz did...
Cruz is a petulant child who will do anything it takes to get what he wants. no matter how many people he hurts. If it wasn't for things being set up in advance, people who rely on the government for Social Security funds, VA pensions, etc would have gone penniless for a week.
Think about that the next time y'all go to post about voting for him. Trump is horrible, Cruz is slightly less so, and is likely even more incompetent(Recall that Trump has bankrupted like two to four businesses).
Personally, the most frustrating thing for me about Cruz is he's from my home state.