Well, I am certainly not complaining, I think it is mostly just that it needs to be compiled to javascript and that you need to have the right dependencies in place. If you are compiling from the command line it takes a long time (I know this is caused by the jvm startup time, but it still is a little annoying). I know there are workarounds such as cljs-watch but setting everything up right definitely takes some time. The browser-based Repl is awesome but sometimes breaks, I don't always understand why. I do think there could be some improvements in terms of tutorials but those will surely come (I might write one...)
So if you are using it on a daily basis then all of this probably doesn't matter but it does take a bit to get started. And I think to some part this reflects the fact that, well, Javascript was not really intended to be a platform to be compiled against, it is just used that way because it is the only platform in the browser.