I just had a better look through the graphs in the report and I can see exactly what you are talking about. There is a clear pattern of trimming against the MCA

I just had a better look through the graphs in the report and I can see exactly what you are talking about. There is a clear pattern of trimming against the MCAS, then just before the speed increases and the altitude decreases the pattern changes. There are still nose up trim commands but much shorter. At that point the pitch trim position changes and never recovers to the same point where the aircrafts height and speed had previously been relatively stable. Also notable is that engines spool-up about the same point to what looks like full takeoff thrust. They must have identified an issue just after going flaps 0 because there is no other reason to go to back to flaps 5 (which incidentally disables MCAS). Why on earth they didn't drop flaps again and head back to the airport is a bit of a mystery to me. I can't imagine the Captain handing control of a aircraft which was obviously a handful to a co-pilot and then looking straight down at the checklist, surely he'd have given guidance about the trim and waited to ensure the co-pilot was handling the aircraft?