Moving content to a fresh DB

Hi,

Our website has a lot of content and comments (around 130.000 articles). In time, beginning with 2011 ’till today, we’ve tested a lot of plugins and options. Right now the DB looks clogged and overloaded. Also from 2011 ’till today a lot has changed in WP, so I feel that a refresh is necessary.

So my wish is to get only the content (articles, tags & comments) and import them into a fresh WP install.

Should I use the Export tool? I’ve gave it a shot with a smaller website and it looked kinda slow. Are there any other solutions or recommendations?

I really appreciate your help!