Ok beto lost by 2.6 points to Ted Cruz. Ted Cruz is not a strong candidate and 2018 was a good Dem year, particularly in Texas.
It is extremely unlikely this race will be competitive in 2020.
Since when was Ted Cruz ever a bad candidate? He certainly isn't the most personable candidate, but he didn't have any scandals or major problems that caused the race to be close. Texas just isn't the safe Republican state it was before. Reality bites for Republicans.
Seriously? Ted Cruz consistently underperforms generic R margins because he is viewed unfavorably by even a majority of Texans due to his complete lack of charisma, obvious further political ambitions, and generally annoying attitude that makes him work poorly with others - even within his own party. In what way is he not a bad candidate?