Is the latest marrow mock worth giving?

Is the latest marrow mock worth giving? I have heard it’s pretty bad. I don’t want to be extremely demotivated after spending 3n half hrs.
Is there any other good substitute?

Don’t give if you get demotivated
It’s pointless giving such grandtest

It’s not that if there are actually good questions that if I get them wrong I won’t fuck it up in the main exam then I don’t have an issue.
But if the questions were simply made tough out of competition from other coaching centres and that aren’t even gonna come, then it’s gonna be useless.