Spain owned Texas for 200+ years but never could settle Texas. The Comanche and Apache Indians were too much for them. Mexico gained it’s independence in 1821. Texas declared independence in 1835. Mexico like Spain before them never settled Texas again the Comanche and Apache Indians would not allow it. Then Mexico invited Steven Austin to bring in white US settlers to settle Texas. And Austin did just that. That means Mexico nominally “owned” Texas for 14 years. Mexicans did not settle Texas, Mexican did not take on the Comanche and Apache Indians. Texans from the USA did. Santa Anna wanted to piggy back on the work of Texans and claim what he never could do on is own. Texans rightly told him to go to hell. The rest is history.
On a side note Andy Jackson had a lot of troops waiting La to take out Santa Anna and Sam Houston was doing his best to get his army to La until his men revolted and attacked Santa Anna on the own. As above, The rest is history.
“Mexico gained its independence”
It wasn’t a gift. it was armed revolution
https://en.wikipedia.org/wiki/Mexican_War_of_Independence
The Mexican War of Independence (Spanish: Guerra de Independencia de México) was an armed conflict and political process, lasting from 1808 to 1821, resulting in Mexico’s independence from Spain. It was not a single, coherent event, but local and regional struggles that occurred within the same time period, and can be considered a revolutionary civil war.[2]
It was okay when Mexico did it to Spain but “wrong” when Texas did it to Mexico?