Gee, I wonder if there's a law famously referred to by Obama's name, that improved the appeals process for denials? Maybe the internet even has information on this that you could search for? [0]
Yes, obviously Obama tried to improve this, and Trump at most ignored it, and will probably make it worse within the next few weeks.
So it's plenty worse under Obama and Biden. They're both the same ffs. Your tribe has more things in common with the other tribe than it has differences.