I don't know who are the market makers behind ethereum but they suck and they are terrible human beings, they are the ones responsible for all this market tricks. They dump at every opportunity and then buy back at the bottom, this game of swings profits has been for a long time but do we blame them? Ethereum team hasn't been transparent and it all started before the pre-proof of stake mainet they pivoted to, alot of people didn't understand the concept and rush in by locking all their investments.
It's not the Ethereum team that is not sincere, but you, as you are exaggerating about what is not there. I've not seen any allegation related to your accusation about the team yet, and all their plans are always pre-warned and published. This is also an open source.
As for the market, it has its pattern and dynamics, and it flows with sentiment. I see no manipulation here, not even with the market makers, because they are everywhere, and their activities are legal to provide liquidity, and of course, for some gains, which are not illegally planned or structured. The Ethereum team will not even dare to contact the market makers or anyone for price manipulation.
Are you really doing this or you forgot that market makers exist? In every market, there is market movers and there is whales. We have them in Bitcoin and every other coins with billions of liquidity, those money didn't come from no where, it's an investment to yield more money. You don't need evidence to know that whales are playing to much game in ethereum.
Anytime there is market dump, market makers buy this coins at low price on their open position but quickly closed their position on small news and then dump everything on retailers. This happen as well on Bitcoin but market makers don't force close their positions like they do on ethereum and that's why you see the price decline at the speed of light, after they open another position and then make the price find it's way up again on resistance. This has been what is going on the market making the price stagnant for long time.
If market makers close their positions on any FUD, news on Bitcoin, I'm not sure we will be here. By the way, the Bitcoin market markers quickly close their position if the price impact will be high but buy again they buy at lower price again and wouldn't close the position because of $1000, they will wait for more profits and then close their positions but this isn't happening in Bitcoin unless there a big damage that controls the outside funds, the ethereum whales are scary.