What you are doing here is a distraction from the topic - whataboutism.
This is like crying about whataboutism when a judge cites judicial precedent to justify a sentence. Good luck with that, it might work as a "nuh-uh" in online discussions but in real life, precedent does actually matter.
Biden did bad pardons, now Trump has no other course (eg fix the system), but to do bad pardons as well? Except when Trump does it it is not bad because Biden did it first?
Personally, I blame lawyers and prosecutors. A law should be simple, easy to evaluate if it was broken, and always prosecuted. And when it comes to punishments, they should be explicit and without the possibility of being altered.
We've gotten too complacent with making all these arbitrary rules, then fiddling with their non-enforcement and severity by virtue of reduced sentences.