Out of 100 shows maybe 10 max may be worth watching. It does not have to be good but atleast it's bearable to watch.
There's this once in every 3-4 years a story comes out that is genuinely good. To represent that story, the artstyle and direction employed manage to elevate the original story via voice acting, action sequence animation, soundtrack etc.
Since there's no bar as to what can be shown in anime in Japan, most of the presentations are raw and manage to extract the full essence of a particular scene... naturally this also depends on the cast working on that show.
The same logic could be applied to American TV shows but there's a limit to what can be shown on TV.
Not all anime are good. Some of them make you question why did you become a fan. But then shows like Monster and other cults make you appreciate the art form
PS: Don't be a weeb. A casual watcher is just fine. Weebs are unbearable