Yes they did present their claims 60 times, but the courts refused to look at the claims. Refusing to investigate claims, doesn't convince me that the claims were baseless. It does convince me that the courts are afraid to open Pandora's box.
SCOTUS didn't look into the claims, because SCOTUS leaves these issues up to the State Supreme Courts, since they are state issues. Their claims failed to convince State Supreme Courts, and SCOTUS saw no need to hear an appeal, since the evidence presented was insufficient.
The absolute holy grail of these terrible lawsuits was Texas claiming that, since Pennsylvania was allowed to alter their own election laws (and the claims that they did so unconstitutionally were already shot down by PA's Supreme Court, and upheld by SCOTUS), it disenfranchised
Texas. That these other states were "diluting" Texas' votes, so they had standing. Their argument included them admitting that they had no evidence of fraud, because the fraud was "undetectable". They stated they did not need to "prove" fraud. They wanted SCOTUS to stop Pennsylvania, Georgia, Wisconsin, and Michigan from sending their Electors to Congress.
Texas v. Pennsylvania - Wikipedia
SCOTUS chose not to hear the case, due to it's utter lack of standing and it's nonsense argument on why Texas was 'wronged'.
The State of Texas's motion for leave to file a bill of complaint is denied for lack of standing under Article III of the Constitution. Texas has not demonstrated a judicially cognizable interest in the manner in which another State conducts its elections. All other pending motions are dismissed as moot.
Two of the judges, Alito and Thomas, said they'd hear the case, but even they wouldn't give Texas what they wanted.
In my view, we do not have discretion to deny the filing of a bill of complaint in a case that falls within our original jurisdiction ... I would therefore grant the motion to file the bill of complaint but would not grant other relief, and I express no view on any other issue.
Texas presented an absolutely incompetent argument, that at minimum would require the
11th Amendment to not exist, as it also had to argue that Texas as a state, and not it's voters, were harmed. To simultaneously believe that Texas could have it's own election laws, but other states aren't allowed to do so if it harms Texas
All of the lawsuits were similarly ridiculous, illogical, and fundamentally flawed, because when you don't have evidence of fraud, you gotta get really creative. Gotta make Trump happy, even if you look like a fool while doing so.