By design, miners control Bitcoin. Before Ethereum, miners were fine with Bitcoin core because they were still making tons of profits, and blocks weren't full. They were almost all following core and that's why core has a lot of power.

Now that Bitcoin hit a scaling ceiling and a competitor who can scale way beyond Bitcoin is rapidely taking the lead, they finally realize why Core/Blockstream strategy is bad for them, and bad for Bitcoin. Hence they came up with setwit2x, wich is a weak attempt to get ride of Blockstream (because its segwit first, then 2Mb blocks, then... not much), but a strong signal that something is changing.