Right. The frontend story of Django is non-existent and it is a pain to reinvent the wheel each time. Need AJAX to work with CSRF protection? Just copy this snippet of code. Want to use SASS? Try to find a django app that provides an asset pipeline, or copy some django snippets, or do it yourself by bringing grunt/gulp/whatever is the latest hyped js build tool.

Now the remaining part of your comment is unfair. Pure frontend is just one small part of webapp development: templating, controller, ORM, i18n, user and session management, security, testing, etc.

You can do a lot of web backend stuff without websocket. Django is ok for that and if you combine it with Django Rest Framework, you get powerful tools at your disposal.