Well that's an easy one. Texas does not get to dictate to PA, AZ, or any other state how they run their elections. Their respective state supreme courts upheld the legality of their election law changes - case closed. You don't get to cry now, after you've lost, that these were unfair.
Secondly, "mountains" of fraud? You mean the stack of "affidavits" Rudy Giuliani carried around but never let anyone see? Could you point me to the case where Trump's lawyers alleged fraud, in court, and the judge wouldn't "hear" it? Show me, please.
Remarkable, the level of cognitive dissonance required to lose 60 court cases with over 90 judges presiding, 1/3 of those being Trump appointees, across five different states, and still thinking the law is actually on your side.