Maximal Spaceability of the set of non-absolutely summing operators in quasi-Banach spaces

For every $0<p<1$, we establish maximal spaceability of the bounded operators on $\ell_p$ which fail to be $(r,s)$-absolutely summing for all $1\le s\le r<\infty$, using the coordinate-disjointization construction and Maddox's theorem. We give detailed isometric estimates and prove a corresponding m