He (Trump) doesn’t need to increase his 2016/2020 votes to win. The electoral college system can see to that.
It’s very possible he loses the popular vote (again) but wins the keys to Pennsylvania Avenue (again).
The longer he can eek out these court cases, the better. The Democrats are struggling and will struggle to fight a political campaign - it’s currently all tied up in the judiciary- which he loves. And which benefits him hugely.
Biden (IMHO) is electoral kryptonite; in this media age, and as an octogenarian, he’s going to find the campaign gruelling in the extreme. Every misstep, every stumble, mumble - Trump and his acolytes will relish it and prosper from it.
The Democrats will rue not choosing another candidate. And Trump, unless he’s barred judicially, will win.