Pushblock would be the wisest choice. Costs a bar but gets you out of trouble.
If they're wailing on you up close, wait for them to use something with a fair bit of recovery and then punish with 111-shackles
Meterburn an interactable if there's one near you. That way you'll get a hard knock down and super armor as you pull off the interactable.
Remember that you have a throw.
D1 is a low with fast start up that can link into shackles.
If they are jumping in whilst you're in a corner: D2-B1-Shackles
Depending on who puts you into the corner and what they do, I would recommend just going into training mode, pick the character giving you trouble, set it to record, re-enact the situations that are hard for you, and then use all of the above to find out which works best for each situation. The pushblock would be your safest option.