See the issue is that I think the developers thought the "competitive" community was way larger than it really was. I'd consider the majority of serious players in Warband to be "semi-competitive" (playing in a clan that took part in the large 100v100 event battles, or something like PW, etc.) and more played for the large battles and teamplay rather than the micro small scale combat. Then you have the casual players who just play on custom servers like tdm or siege just for fun. I'd say the semicompetitive and the casual players made up about 98% of the warband multiplayer community, so the "audience" TW was trying to cater to with the Bannerlord game modes was actually extremely small in the first place. Aside from the combat problems, a big reason Bannerlord mp died so fast is that the vast majority of players didn't get the modes or gameplay that made mount and blade unique that they liked back in warband.They did focus on the competitive scene initially.
The class system design was a competitive focus, not a casual one. It's pretty obvious when it only works for skirmish of captain, both which are designed to be competitive