This is the crux of the issue. Executive power has been gradually expanded since at least the end of WWII, but things have accelerated since the early 00's. Think GWB's "signing statements" or Obama's "phone and pen." Trump I, Biden, and now Trump II have continued to push the limits, in part because of a desire for more power but also because Congress hasn't functioned as an institution in decades. Congress has passed a budget on time only 4 times since 1977, the last time being in 1997.
Presidents are elected based on promises made to various parts of the electorate, and if/when Congress won't act (often even when Congress is controlled by the president's party, nearly always when controlled by the opposition), no one generally makes a fuss if the president pushes through a popular-ish thing by executive authority. Republicans may be happy now but they won't be when a Democratic president ups the ante in a few years, just like Democrats were perfectly happy with Obama and Biden's overreaches but are furious at Trump's.
I was reading a rocking history book (Dark Continent), and it argued that Germany had already lost democracy before Hitler, as basically all rules were done by the executive. Sent a shiver down my spine when I applied it to recent US presidents. (The book was written in 1998 fwiw, so not contaminated by current events).
Congress needs to be expanded to do its job, and drop the filibuster. We need more, proportionally allocated representatives. Representatives that come from more than one of two parties. Representatives that spend more time at home than on the campaign trail or in DC.