yeah unfortunately disposable diapers aren't mean to be worn very long and are made to be low-cost, so they're not verry duable. Physical activity, and especially sweating, really breaks them down fast. This last week's been pretty hot here, and we had a week or two of really hot weather last month also. Diapers aren't nearly as enjoyable during those times because of how much the movement and sweat breaks them down.
This has been discussed quite a bit in the past, often around mid-summer as you might expect, and there haven't been many options suggested. If you think you might enjoy trying cloth, that's probably the best suggestion, even if you only go with that during the worst of times. So-called "breathable clothlike" materials don't seem to be very breathable in reality, I think we've decided that's just a marketing ploy to use cheaper materials. I don't find clothlike to be noticeably better at preventing sweating and diaper degredation during the day. Adding more powder on my hips under my diaper wings helps there, but front/back/middle don't seem to have a good solution for me. I just have to accept my diaper's going to clump and the padding is goign to break up and shift around and probably start collecting down in the crotch a bit.
Some diapers hold up better than others for sure. You'll need to start with something thin to begin with; thicker diapers are just going to make you sweat more and cause bigger problems if the padding starts to migrate downward. Although higher-sap diapers tend to be thinner for their capacity, the sap seems to accelerate clumping and reduce airflow for me, so I'd suggest you stick with a thinner, medium to low sap diaper. There are quite a few to choose from, my personal preferene right now is Tykables Little Builders. For daytime I've also worn Totaldry Plus and ABU Preschool (those come in both plastic and clothlike)