My APA tasted good after 2 weeks, but after 3 weeks beer changed color and taste stale. Could be oxidation? And why did it appear after 3 weeks?

Can somebody share recipe with good hops combination to get non-citrusy beer. I know I have to stay away from Citra, Cascade, Centennial, Amarillo, Simcoe and maybe Chinook. So far I came up with one recipe, and do not know if it is any good: Type: All Grain Batch Size: 10.00 L Ibu 43.6 Est OG...

Hello All, I have made two batches so far and it did not turned out as expected, but we drink it all... So I need your help in this new APA one. Is percentage and selection of malt ok, and what do you think about hops selections and schedule? Type: All Grain Batch Size: 10.00 L 2.20 kg...