You are not gonna find full replacements for adobe products but you can always pirate

InDesign: https://www.scribus.net/

Lightroom: https://www.darktable.org/

Photoshop:

• GNU IMP: https://www.gimp.org/
• Krita: https://krita.org/en/

Illustrator: https://inkscape.org/

Premiere Pro: https://kdenlive.org/

Acrobat:

• Reading PDFs:
  • Windows: https://www.sumatrapdfreader.org/free-pdf-reader
  • macOS: I like Sioyek, but there are like a million options (including Preview.app if you’re lazy)
• Creating PDFs: Everything listed above (where sensible) can export PDFs
• Editing PDFs:
  • https://www.libreoffice.org/discover/draw/
  • Inkscape can also do this
  • Preview.app can do some basic edits

If you have a edu email from any former university time you can try and get a student discount via college buys

As far as I can tell it just needs you to have the college email address but otherwise doesn’t check anything

Try the open source stuff first but if there’s something you really can’t do without then go to a reputable tracker or metatracker and grab a high seed/leach-count torrent of your desired “linux iso” and you’ll be fine, these days it’s the official releases that come with the spyware…

I replaced CC with:

Affinity suite (v2, pre Canva, still works) for Photoshop/Illustrator/InDesign, it is pretty impressive if your Adobe workflow doesn’t rely heavily on plugins. The InDesign equivalent can do stuff to PDFs, but you won’t find the form builders etc. that Acrobat has.
Exposure x7 for a Lightroom-alike, it’s not as good (noticeably, highlight recovery from blown-out RAWs is much better in Lightroom) but it does the job for me
DaVinci Resolve for Premier

If you don’t need to be able to collaborate professionally Affinity works well enough. Canva bought it, which sucks, but it works and the UI isn’t complete shit like a lot of alternatives. Iirc it will open psd and idml files without issue (idml not indd tho). The RAW editor is not great though

Otherwise rutracker has several options

I’ve heard affinity is pretty good and it does illustrator, InDesign and Photoshop stuff, it’s free but they jammed some optional AI stuff.

For drawing I’d recommend krita, if you need a substitute for that part of Photoshop.

For video editing you can use DaVinci Resolve, it’s free but has a one time purchase version with extra features.

Acrobat is tricky, if you just want a pdf reader there are many, but some features of their pro version I have never found on other programs.

I remember using darktable for photo editing, it seems good, but I’ve never used lightroom, so idk.

Depends on the functionality you expect from each, and if you work alone or integrated into a company relying on Adobe products. But yes, in general, you could replace every single Adobe product with an alternative, either libre or proprietary.