Lets say If you had special chances to take degree right after your SPM , would you take it ? Will it be so difficult that I can't understand a thing in the class ? Just a average student , not a straight A student. And the course i talking about is IT / Computer science

Yes, understand. However, it's how it is worded. Anyway, from Year 1 to Year 2 also not guaranteed, much like entering degree, not guaranteed to graduate. So, if "foundation" fail, also cannot grad kind of logic.  Anyway, yes, agreed, just how it is marketed and most auntie / uncle will look at entering Uni means go do degree

Depends on the programme. Computing has a very specific standards to follow (although some universities don't really do that) and has pre-reqs for subjects.

But yeah - nowadays it's easy to coast by on just a pass to accumulate 2.0 CGPA and graduate. It also depends on the university system on failing. Does the repeat module replace the failed module's CGPA or not. If it doesn't then it is super difficult to just coast by.