UK Politics

They wouldn't be seen to do this. Because throughout the entire affair they will be criticising the SNP on real and imagined issues. They have substantially more political media presence in Scotland (SNPs presence is largely government, or criticism of the SNP). They are also substantially better funded than the other parties in Scotland, despite a significantly smaller number of members. This means they can set their narrative rather well. Those that don't pay much attention to politics will base their vote on Rishi Sunak rather than Douglas Ross.

Those that pay attention to politics in Scotland are less likely to be changing their vote irregardless of the Conservatives parliamentary record and will do so again. They are voting for a leader with three jobs, who repeatedly shows he doesn't understand how the Scottish Parliament operates and in a friendly interview when he first became leader proposed enacting genocidal legislation if he was prime minister for a day.

The Scottish Parliament has a serious lack of talent in the opposition parties. There are some exceptions of previous leaders that were sacked and some newer MSPs. The SNPs landslide elections and the way party's selected candidates in Scotland PR system prior to this wiped out the vast majority of senior party and talented members in particular. If you follow Scottish politics closely it's hard to see anyone that is going to compently run the Scottish Government other than the SNP.