Whatever has been done to this has made it so much worse. PDFs used to open immediately and I was able to search and find what I needed in a PDF straight away. Now, when I open a PDF it loads like I'm on dial up, and when I search it may give initially give me a result saying "1 of 2" or something like that when I know for a fact there are at least 20 mentions of what I'm searching in the PDF.

Just take it back to the previous version of Acrobat in Chrome, there wasn't anything particularly wrong with it.