The problem with the HPS is not that blocktrades dictates wich proposals get funded. The problem is that out of the ~143 million staked hive only a fraction cares enough to participate in governance.. You "only" need 21.5 million to get over the current threshold.
I don't think that complaining about not receiving support from the big accounts is a good strategy (it is what it is). Instead you may consider targeting the stake that is not participating. The combined stake of all of the "dolphin" accounts is enough to surpass the return proposal (for example).
The DHF works exactly like witness voting. We have more than enough posts talking about the problems there... they existed long before the DHF was proposed. This post highlights that issue. This post is also hoping that at least some people who vote for the return proposal would agree with me, which would make asking more dolphins and orcas that much easier. I haven't given up, and all my posts encourage stake holders to take a more active roll in on chain governance.