enable antialiasing and padding/diffusion on your bakes - that will eliminate most of it. anything that remains is due to UVs not being straight or your textures being too small. baking at a higher resolution than you are working out can help, but you'll get the most benefit from arranging your UVs so that as many edges as…
It's done deliberately to reduce mipping artefacts when you are viewing from a distance What you're showing here is the opposite - your texel rate is too low for the screen pixel rate and you're getting filtering artefacts as the GPU scales the texture up. I'm not sure what you're viewing the examples in - I would…