You all rejoiced when 50/50 + Downvote pool was enabled..

That is in fact NOT true. Some were happy, some were skeptical and some were against it. For most part people wanted to see what will happen and if the effects would be positive.
Even you yourself were for #newsteem until you realized you would have to curate instead of just sit back and collect bot payments, which you are obviously not happy with.

but now you are all crying because as I told you before..

Nope, this again is in fact not true. I see very few people crying. Those that are crying are some bot owners, and i emphasize the "some" since many have pretty much adjusted to the new system. Its just you that has a hard time accepting that the old ways are done for.
Ofc there are also the garbage posters the likes of which you can find in this comment section that are unhappy that they can no longer buy votes for their posts.

The opposite is actually true. Even though the trending page is far from perfect and the votes are skewed towards influential individuals and the trending page lacks diversity, this is still better then what we had.

you cannot make money by preventing others from making money.

Who is preventing you from making money? Go curate, you can make as much curating (or more even) now as you could have selling votes in the old system.
Its just that youre mad that the stake holders no longer want to have a trending page where you can promote your posts basically for free thus destroying the value of a trending spot, they dont want people breaking proof of brain and buying themselves a trophy, they dont want STEEM to be seen as a garbage blockchain where everything said about it is fake and a lie...

destroy the motivation of developers and business entrepreneurs.

Browsing social media i can confirm that alongside the high inflation, bots and vote selling is the prime reason people gave as to why they stay away from investing in STEEM. So yeah, id say the opposite is true, this in fact might have positive effect on developers and investors.

I suggest you stop crying and start curating, or get someone to curate for you. Bidbots will not make a comeback, you dont have the SP to take down smooth, dan, traf, acid, blocktrades, etc...

Adjust and make the $$$