How to avoid working for big corporations?

After a string of jobs in some big corporations in the outsourcing BPO sector (3 US- and 1 French-owned), I'd like to avoid working for them. They're cult-like, people working in them are shitty usually, too much office politics, and the jobs themselves are dead end ones, suitable for high school dropouts (I have good uni education).

It's akin to slavery. The only good thing, great even is my company offers part-time shifts (4 or 6 hours per work day), so you can work some full-time days and have more days off weekly to do things you really like. It's not like being shouted on the phone by angry clients from 9 to 5:30 is my dream! And I'm in reservations, I'll never work in Customer Care!

Working 8 hours or more for 5 days a week is too much for this vicious industry. However on LinkedIn only HRs of such companies contact me. Pfizer, IBM, Accenture, etc. Different names, same ugly carpeted gray offices with 100s of ppl, same cult-like mentality, same fake smiles at the interviews and staged photos only from the cool common areas which you won't use often.