Many PDF apps do those functions (straighten, optimise).
Ones I've used include Nitro (formally called PdfPen Pro; available in Setapp), Kofax, PDF Expert, and many others.
The reason Acrobat Pro is good, is because it does PDF edits 100% to the PDF spec the best (given it's of course originally an Adobe standard, before becoming open) along with very reliable OCR. Other PDF apps, including Preview, can do editing to various levels but not always as reliably. But the price is ridiculous, making others a necessity unless you live to edit PDFs continually.