We had this guy at a company I worked for. Always said yes to the attractive assignments that were good for his career and refused others on grounds of having w

We had this guy at a company I worked for. Always said yes to the attractive assignments that were good for his career and refused others on grounds of having way too much on his plate. Then after a while he‘d delegate the attractive assignments after botching or half-finishing them (often requiring a complete rewrite). Only to accept new ones („I‘d love to do it but i’m currently swamped with XYZ, maybe ABC can take over here? it’s basically done“). I think he deliverately functioned like that, and it got him promoted almost all the way to the top. One reason I left!