This is probably due to a low ADP / Agility. The number of frames in a roll is linked to a stat in dark souls 2, namely, ADP. (ATT also, but to a much lower extent.) You start with about 8 frames, which is significantly lower than Dark Souls 1 and 3's 12 frames. As a result, it can feel as if you're getting hit by things you should be dodging to veterans of Dark Souls 1 or 3. If you want 12 frames, simply raise your ADP to 25. I hope this helps you and anyone else with this issue out, and good luck!