why is Labour fucking up so badly right now?

not British but every time I hear about the UK it's about Keir Starmer making the worst possible fucking political move.

Scrapping disability benefits and cutting welfare spending feels genuinely insane for a labour government...

is there a genuine reason why labour is so afraid to be more ambitious and pass a wealth tax or a tax hike on high earners? they don't even have to worry about midterms like Americans do. I understand the UK has been economically fucked for a while - so would borrowing or raising more money be as economically infeasible as labour claims?