Ive always found that just buying exactly what you want gets the point across. Just not engaging with disney at all isnt gonna send them a message on what people actually want. Sure they could listen the the voices on twitter, but that's exceptional. The reason why something like the mandalorian got green lit is because Disney saw (surprising no one) that Boba Fett stuff always does really fucking well.
You should be able to buy what you want if you want it. Thats not to say the people who buy literally everything that comes out arent problems, but thats more of a problem with their brain. If you like stormtroopers. Sure, buy a stormtrooper action figure, youll get more characters that look like stormtroopers. Cutting cold turkey in some sort of protest goes about as well as the occupy protests.
As for overall numbers, merch is in the shitter compared to prequel stuff, and thats because one of your previous statements is wrong, the people like the people in this thread who still buy stuff almost have no effect on overall merch sales. Its all children, and children just arent asking for rose and holdo figures. The "hardcore" fans or even older star wars fans barely factor in. Also, as for buying tickets, the over all success of the movies is secondary to this franchise and its naive to think otherwise, the already mentioned merch is what matters. Whether the movie is critically panned or loved, if it flops or makes 10 times its budget. What matters is the merch.
While I do understand where you are coming from, its just a naive stance. Also it does make you come off as MATI.