Turmeric does have real anti-inflammatory properties supported by actual research, so it's not just hype. The studies showing benefit are legitimate, though they tend to use concentrated doses that are higher than what you'd casually get from food or many off-the-shelf supplements. The absorption is also a real issue - curcumin on its own doesn't absorb well into your bloodstream, which is why better supplements include black pepper extract (piperine) to help with that.
That said, here's what the other answers haven't really flagged: chronic knee pain lasting a year could be from a bunch of different things - arthritis, ligament issues, cartilage damage, tracking problems - and they don't all respond the same way to anti-inflammatories or supplements. Your coworker's experience with turmeric helping her arthritis doesn't automatically mean it'll work for your specific situation. Before you swap ibuprofen for turmeric, get imaging done or see someone who can actually diagnose what's going on in your knee. You might discover you need something completely different, or you might find that addressing the root cause makes the inflammation part easier to manage anyway.
If you do want to trial turmeric, at least give it a solid month or two at a decent dose (not just a capsule here and there) to see if there's any actual difference for you. Just don't let it become a substitute for figuring out what's actually wrong.