Remember: if anyone supported DOGE or still supports DOGE, they (both DOGE and their supporters) were not ever serious about the debt or government efficiency.
Elon was serious about the debt. Thats why he and Trump don't get along any more. After the initial DOGE efforts, Trump raised the debt ceiling a few trillion dollars and got a new spending bill passed that increase spending like another trillion dollars - obviously not concerned about the debt.
"serious" at a superficial level. He never understood what he was doing, and went around smashing things indiscriminately, often in a way that was more expensive (e.g., laying off federal workers who were paid for doing nothing for months, then rehired when someone realized that they were in fact doing something valuable).
They were, but the actual cuts needed (to entitlements) are politically impossible to make.
Which is why they went the non-democratic/illegal route by avoiding congress.
So they did a thing they knew wouldn’t work? AKA not serious about solving the problem. The OBBBA budget bill did make some cuts though, anyway.