Senate rules that tie one hand behind their backs

Rules the democrats put in place on themselves twice, and republicans remove as soon as they're in power.

You don't get points for handicapping yourself.

POTUS position is some kind of emperor who can just simply decree “Make it so” and boom it happens

The US executive is one of the most powerful positions on the planet. They appoint the head of every single federal agency and are the only ones capable of directly enforcing their will. We saw it under Bush when he went to war without congressional approval and essentially said "Yeah I'll ask permission to stay 9 months into the war". We saw under Trump he just ignored the SCOTUS to fuck off and face no consequences, we saw under Biden he can just go around congress for many things like arms for Israel and summery deportation of asylum seekers.

The difference is we want the executive to use their power for good, not either pretend they don't have it or use it for objectively bad things.