Difficult AE

I'm an SDR and working with one particular AE is proving very difficult for me and other SDRs in my company. for the purposes of this post, let's call this AE Sam. we (the SDRs) run the discovery calls alone and then book a meeting with Sam. 

Sam hasn't been at my company very long - less than a year. people don't seem to like him very much. but I have heard a few people say Sam is 'very knowledgeable' - but I'm yet to see evidence of this. Sam has very little in his pipeline currently. 

Myself along with other SDRs do our outbound prospecting, run discovery, and book meetings with Sam. Very often discovery goes very well, lots of notes taken, pain identified, right person to speak to, meeting with Sam booked in. 

Sam then seems to run his meetings so badly it is so embarrassing for us to watch. He doesn't read any notes from discovery, doesn't let the prospect speak, is terrible at building any kind of relationship with the prospect, and it is often the case the prospect leaves the call looking noticeably annoyed and no next steps in place. 

The problem is for us (the SDRs) this is affecting our numbers and makes us look bad. What would you do?