I know this isn’t too much X-23 info, but Deadpool is pretty strong against Hulk. Start Deadpool, and immediately try to get breathing room, which isn’t too hard if he doesn’t have Drones. Once you get away for the first few seconds, you can just annihilate him with guns. If you get close, cold star strings give you a chance for high/lows that Hulk can’t mash H out of, or you can be supersafe and do strings into guns into teleport fullscreen (trololol), lay a grenade/ninja gift out, or both if cold star covers you for it.
And always XF on Hulk’s second AA gamma charge, if you XF during the H a good Hulk will go straight into that or a forward-then-retreating Gamma charge, I spar against a good Hulk a lot and he has those reflexes on speed-dial.
If Hulk gets desperate and tries to gamma charge + assist, if you hit them with random guns you can go into guns super, XF, dash and Quick Work H, get a full berfday combo that should be a guaranteed kill on both opponents, regardless of whether you’re using the otg assist with X or not.
On Hulk, probably play Deadpool/Ammy/X-23 for the good DHC. Against most others, X-23/Deadpool/Ammy sounds like the stronger order, and just hold assist 2 when you see a Hulk on point.
Non-Deadpool notes: With Ammy, don’t be afraid with whip to shoot ice when you’re fullscreen, I saw you trying to close the gap on Hulk and it’s not super necessary. Also, don’t forget that if you’re in whip, you can j.H and switch to sword, dive kick, switch to disc and overhead j.H or j.LM into closeup pressure, which is pretty substantial for Ammy.The inputs are a PAIN online, but just whip j.H itself is an excellent space control tool, and can keep Hulk sitting still, which is nice. His team has to respect it a good deal.
Right now, I like the patience, you are an honest player, and put work in to the team. But this is marvel, and the team you’re running has so much more cheap stuff to abuse. Also, XF3 Ammy is insanely fun, which is my recommendation for her on back. Regardless, though, with that team, X-23 has to work on her own to get close in a good position, then when you’re there, Ammy can get you a hit. Try dashing around a bit more to see if you can force that initial entry (though this is more against Taskymaster than Hulk, st.H is scary).
Oh yeah, and what jaytoo said totally use st.M and cr.M a lot for the Hulk fight, those multi-hits are excellent, and with fast movement, you can be on them with an M in a flash.