Reddit also doesn't have a built-in button to ban a user while you're looking at the offending post or comment; you have to go to a separate "ban users" page, and copy/paste the username to ban.
The official mobile app, so far as I can tell, doesn't have ban functionality at all. You can only approve/remove/mark spam and lock threads.
Moderator communities have worked around this, somewhat, with browser extensions that provide mass-remove and inline ban functionality, but they're only a partial solution. The mass-remove in the mod toolbox extension, for example, isn't always able to get everything, because reddit itself only partially loads busy comment threads, and the extension can only remove comments that are actually on the page. So you have to remember to force-load the whole thread and sometimes click through the "we don't care that you wanted all the comments, click to another page to see the rest" links.
The mod toolbox extension (/r/toolbox) also adds some pretty essential things like macros for common messages that need to be sent to users, shared notes all the moderators of a subreddit can see, etc.
Especially given that AutoModerator exists and can be set up to automatically remove posts or comments based on particular key words or even regex, and odes it so fast that not even the various "view removed reddit" services can show you what was there.
Automoderator, like RES, is a third-party addition to Reddit.