I traveled a lot for work and for TKD specifics, so I have worked out with and met a lot of instructors. I traveled in and around Houston a great deal.
You have a LOT of choices in the greater Houston area.
Because we competed together at the world level, and I trained at his school often, my favorite is Master Choi's World Champion Taekwondo in Katy.
Definitely check out Golden Eagle TKD. Master Aaron Um is legit, and they have a Great group of instructors.
I worked out at Master Lee's a few times. It seemed like a good program, but I did not meet Mr. Lee personally.
For something different, I have trained at Meng's Martial arts several times. Great school.
Take your time and audit several. Ask your daughter if she wants to pursue competitions or a more rounded program. This will help you survey schools. If she wants to compete, look for WT/KKW schools with a good reputation. If not, look for programs more suited to her wants and needs.
There are a Ton of Tiger Rock school in Texas and Louisiana. It sounds like you are seeing the warning signs.
I wish you and your daughter all the best.