It's quite the opposite actually. Actual policy and history demonstrate that they absolutely do not follow through with their claims and promises. You seem to be ignorant of both of these while basing your opinion off the empty rhetoric they spout in the media.

Their most landmark legislation in the past 20 years was the ACA, which they passed when they held a supermajority in government and didn't need any Republican support, and yet they decided to drop single-payer in order to pass a Republican healthcare plan that cemented the private insurance model into law while increasing government subsidies to insurance companies meaning even more of our tax dollars are funneled into executive and shareholder pockets while people are still struggling to afford skyrocketing healthcare costs. They didn't need any Republican support (nor did they receive it) yet they still chose to screw the American people with this bill. How do you explain that?

They also just unanimously voted to pass an internet censorship bill along with all but two Republicans. Trump has stated that he will use this bill to silence his critics and every single Dem Representative voted in favor of it.

They also passed the Republican government spending bill which retroactively legalized all the illegal DOGE cuts they'd been making.

Maybe you should stop listening to the empty promises and virtue signaling and start looking at their actual actions. Modern Dems are to the right of Reagan even if they claim otherwise.