Trump raised $100 million and gave out only $15 million of that to his endorsed candidates. Blake Masters faced an avalanche of money and could have used the help. Laxalt barely lost and even a little bit of money his way would have made the difference. Nothing more needs to be said.
And let's remember that this was to help a "Republican" senator who sided with the Democrats on just about every consequential vote in the last two years.
That pretty much tells the story of the 2022 midterm election debacle for the Republican Party.