Does Trump have a valid point with voter fraud, since he supposedly won this thing in 2016?

No. That rump's Russian intelligence friends under Putin were able to convince enough Liberals to be ambivalent or indifferent about the election in 2016, doesn't mean he was able to repeat the action; especially when he was running against his record in 2020. 

These very prominent and powerful attorneys would not risk their professional reputations on make up bs.  I have to believe they have plenty of evidence of fraud and other issues but somehow they are not presenting it correctly to the judges.  I'm not an attorney so I don't know how it works.

Yeap,, that's a good plan