Democracy isn't about rules, it's about culture.

America is an example of what happens when you rely on the former not the latter. They have all sorts of rules against misconduct in office, and these rules are routinely abused by the far right to try to shut down their opponents - such as the Republican attempt to impeach Biden with no evidence as revenge for Trump's legitimate impeachment, or attempts to impeach the Democrat Attorney General in Georgia for investigating Trump's attempt to fix the election there, or the expelling of black lawmakers in Tennessee for protesting in support of gun law reform. Meanwhile Trump himself - a twice impeached, convicted criminal - is currently narrowly leading in the polls for their November presidential election...

You're under the impression that the rules you're advocating will just get used against the bad guys. But what will happen in reality is that the very well-funded bad guys will hire some very expensive lawyers who will use these laws to harass the good guys and tie them up in spurious investigations and court cases.

In a democracy, the ultimate punishment for an ill-intentioned politician - liars, cheats, rulebreakers - should come at the ballot box. In a democracy, the political culture makes it the job of the voters to doll out the punishment on election day. The more you take that responsibility away from voters by investing it in rules and regulations, the more you risk diluting voters' sense that this is their job, and the more ill-intents you'll find getting elected (a la Trump). Sometimes that's a risk worth taking, when we're talking about corruption or national security breaches - things where the damage a bad actor can do may so dwarf the voters' capacity to punish them. But I think voters are pretty capable of spotting a political liar and punishing them at the ballot box.