currently using libreoffice draw.
It’s very limited, but you can use Gimp or Inkscape to edit a pdf in a pinch. IIRC gimp can’t edit existing text in pdf, but inkscape can.
Stirling-PDF is amazing
LibreOffice Draw can make changes to PDFs.
having layering(hope that the right word for a group of text, icons and symbols) issue where icons and symbols go missing or get replaced by square boxes
Might be an issue with fonts?
Do you mean “Based” OS or based os?
What kind of edits are we talking? Firefox can add signatures and text now in its built-in pdf reader.
résumés and stuff
You don’t need a PDF editor to create PDF’s, you can print to PDF in any program that can print, including LibreOffice Writer.
for editing, like for reformatting pdf content.
Pdfs were never meant for that… people dont get that and try to convince you you need to edit damn PDFs.
Pdfs are a format for viewing documents, with most editing capabilities stripped. Libreoffice and MSoffice both have a feature to export a PDF with an embedded .odt or .docx, that you can actually load in a regular word processor, edit and export.
For small edits I usually use https://xournalpp.github.io/
I think OnlyOffice also recently added PDF editing.