He added language and amendments to the bill that he knew would make it unacceptable to the democrats, which in turn killed the whole thing. It’s like a company making a hostile takeover so expensive in employee buyouts that nobody would ever consider doing so.
It is my understanding the every amendment Ted offered was voted down. I know many also think what you have said, but I haven't seen anyone provide a link to the specific amendment that he proposed that was adopted.
I think a lot of Cruz supporters are misinformed about this and I'd welcome anyone who can link to a Senate source that shows what he supposedly added.