combine large number of pdfs

What happened to Preview?? Apple completely ruined it. If I want to combine hundreds of single pages into one pdf, I used to be able to just open them automatically in one window, all the thumbnails appeared down the side, I could sort them by filename to make sure the pages were ordered correctly, then print the lot to a single pdf. Now I have to open every single page separately and manually tell each one (of hundreds) to view thumbnails, then manually drag the thumbnail into position??? I’m not going to be doing that. Preview was the one thing that kept me from switching to windows! Please tell me there's a way to either roll back to a previous version of Preview or OS, or a setting I can change to get back the old way of combining pdfs!

(High Sierra 10.13.6 and cannot update further as it's an old machine)