Ok I’ll add my 2 cents. Like people said, you don’t always have to dp, use normals. For short jumps, well those are harder, but if they do it like 3 times in a row it’s safe to assume they’re gonna do it again (even Ino gets predictable sometimes with short jumps when he has meter), so have a dp ready to go. Normals still stop short jumps pretty well, but sometimes they trade or have to hit early to be effective.
When you do choose to dp, which is most people’s preferred AA, do it deep like you said, it’s not hard just practice the timing. That way they can’t airblock and you’ll be invincible. Another little trick (well not really a trick) is if you keep blocking their jump-ins and they go into block strings after the jump-in, dp right when they land so they have to think next time if they still wanna do that. Once they know there’s a good chance of being anti-aired that’ll stop about 25% of their jump-ins anyway. It gets more complicated with p and k grooves, and a with meter, but that’s the basics.
p.s. Jumping straight up works pretty well too, in fact that’s Blanka’s best AA. Jump back fierce is good for escaping crossups too