Enemies catching me mid air and blocking everything

Hello everyone! A year ago i completed ninja gaiden sigma for the first time with JTB playlist for beginners, I don't liked the experience at all and jumped to og ng2 and falled in love with it, but i still want to understand ng1. Now I'm replaying it on Nintendo Switch and still can't figure some things.

Like how to deal with enemies that blocking all my attacks? How shoud i approach them? I'm trying to wind path them, but Ryu lands too far even for forward loght attack after landing, how to deal with such enemies, especially while they are not alone and ESPECIALLY with bosses (gamov and alma makes me really crazy ngl).

My second struggling is enemies catching me in the air, I'm traverse in the arena mostly with roll jumps and enemies just shooting me in the air constantly, I'm tried rolling to the side and jumping forward, but still not consistent avoiding damage, what should i do? How should i move from enemy to enemy (especially black spider ninjas and military guys)