That law suit would NOT have overturned any election.
It would have forced the state of PA, to explain how they could make laws, and enforce them, outside their legislature in elections and not effect all the other states.
You need to read the 14th amendment.
Because of their (scotus) cowardice, we no longer have a constitution and therefore states need not abide by it.
There is even an amazing amount of evidentiary proof already, with more coming out every day.
The path to beating the steal has be worked on a lot of different levels and the process is playing out in real time.
President Trump has very clear and real path to victory. The best best way to put it is that the Texas case was a critical waypoint on the path to victory, but it was far from the ultimate destination at the end of the path.