Here's the thing antis need to understand. A lot of former Cruz supporters, myself and my wife included, took a 2nd look at Cruz and saw him as a phoney, a fake. Dishonest and playing a role. A lawyer who created an argument and positioned his public perception image for it. Personally I now see him as a globalist and dishonest who played the role of a hypothetical super conservative as his best chance of riding the people's anger at Government into the White House.
A lot of the stuff that happened in the Primary the Anti's refuse to acknowledge hurt Cruz's image as a "Honorable Constitutional Conservative" Things that are dismissed by anti's such as the Carson-CNN thing, The Wife attacks, The constant twisting about what Trump said. His duplicity with billionaire gay activists, his exposed history where he argued "reasonable gun control" was fine in Heller, His big donors, backers etc being of the other side in our fight, etc.
The big split was when he in lawyer (aka tried to come down on both sides) speak resulted in the perception in many minds that he blamed Trump and the police for the violence.
People can and do disagree on all of the things above and more. I have no intention of rehashing them now. The fact is lot of conservatives, including Texans, do not see Cruz as favorable as he once was considered. Bottom line there are 2 sides to the issues of why people left the Cruz camp. This poll reflects that Fact.
Here is a another problem hes facing right now. He has the power to tell his people to back off sabotaging Trump at the Convention. He also gave his word to support the winner. That hes not doing either is obvious and many are now looking to blame Cruz (since its his people) for the problems they will try to cause at the convention. A tactic sure to lose and will come back and bite Cruz in the ass when he runs for reelection.
I posted this to explain what I see as why he got beat so bad in the primary by voters in the primary and hes still dropping in popularity with conservatives. I will not argue any of the points above. This is for information and education, not flame bait.