Even with Germany it turned out that Angela Merkel did grave mistakes and Germans were able to find out about those only after she left office. Being continually in office gives you the ability to hide your trials. The longer you stay the easier it is for you to get elected.
That’s why it is very important to have a time limit in power.
I check my brake pads every year. Eventually the incumbent pads lose out to some whipper-snapper from the new pads box. I might vote red again or I might switch to blue. It depends how muddy it is. Either way, it’s both a new/old choice as well as a red/blue choice.
Time-in-office is also a major contributor to corruption. Lukashenko has been winning the same election for 30+ years!
I really can’t understand how Brazilians (that actually have a multi party system) keep having to choose between two awful candidates.
I would rather limit not amount of terms, but the age. Not eligible for any kind of elections if you are 60+, both as candidate and as voter.