The Tea Party began while the republicans had no power. The policy differences between the GOP and the Democrats are clear to anyone paying attention, although Kamala ran to the right to try and close that gap.
If you set those differences aside, are the parties any different? Yes, actually.
The GOP actually wants to accomplish the things its base wants accomplished and is willing to do anything to deliver.
The Democrats have never, not once, in my entire life actually wanted to accomplish anything its left-of-center base wants accomplished.
Exhibit 64,973,651 (but who's counting):
Yes I fucking hate Fetterman, but he got hit with the stroke gun and can't avoid saying the quiet parts out loud.
Make no mistake, the entire party feels the same way as he does.
It's hard to win a war when one side is busy running up the score as long as the other side refuses to acknowledge there's a war going on.