At least one case was even dismissed due to lack of concrete allegations.
Their belief that nobody will listen to their evidence is just another part of their fantasy, another part of the complex of lies.
From a quick search, multiple courts have judged on merit, and found no compelling evidence provided.
Trump’s team has notched up over 60 losses in court so far.[1]
“They are being told by the other side that there is no evidence, but this is the same other side they think have been lying to them for years, so of course these people will not believe the other side.”
Actually at this point they are being told that by senior leaders from their own side - see the statements from Republicans Brad Raffensperger and Mitch McConnell this week.
[1]https://www.buzzfeednews.com/article/zoetillman/trump-electi...