This release of plasma (6.8 and 6.8.1) has been buggy for me.
dot-0 and dot-1 releases have always been on the more buggy side, simply because several bigger distributions tend to aim for dot-2 or dot-3 releases and rolling release users are the early adopters who do the bug reporting.
I’m having random freezing, issues with suspending the pc, memory issues and many others that for the first time in like 5 years
I suspect you're on a rolling release distribution and something broke in general. How would a DE cause memory issues?