Bees do tend to be more defensive in the fall, and as stated when there is no flow.
I had two hives I had been struggling with. The first one I opened after a little smoke came out the moment the inner cover came off. I took about six stings. hands and through the jeans. That was the end of that story. I put my gloves and veil on, smoked my pants and took the hive apart. Frames of bees got distributed among the needy hives in my yard and the queen was summarily executed. Apparently the other hot hive saw what happened and were as gentle as kittens when I opened their hive. I had hoped to get them through to spring and requeen them.
I will deal with them being a bit uppity when they have a reason, as mentioned, no flow, no queen, Mites, disease, or pests like skunks riling them up. Beyond that I don't put up with it. I keep bees because I enjoy it. The hives I do not enjoy get new queens or dispersed.
Look for the reasons as stated above.
I go into my hives in the morning hours when possible, 9 am to noon, and usually do not wear a veil or gloves. In mid to late summer and after I put the jacket on so I can raise the veil if necessary. Bees buzzing me bumping etc I will put up with. Outright attacks I don't. Hope you can figure out why they are angry and correct the situation!