Lawyer here.

"[A]nyone that actually reads Supreme Court decisions" is the pertinent part of your comment. That is a very small group of people,* and usually a very quiet one that doesn't jump to the conclusion that the court is "illegitimate". The vast majority of the 50+ decisions each year do not make the news and the plurality of them are decided unanimously.**

* Basically nobody, unless it's their job, reads every case. However it is normal to follow a site like SCOTUSblog.com and get summaries to stay in the know.

** I guess check out any of the years here: https://www.scotusblog.com/reference/stat-pack/