This country was founded on the idea of STATES rights, we turned this into PARTY rights.
The idea would have been that people fight for a NON-PARTISAN representative for their district to get into the house, thus ensuring that everyone in a given DISTRICT has a voice.
Party politics don't care about what the people of a particular district want, they only care about what the PARTY wants. Hence instead of having 435 different VOICES in the house, we only have 2 different voices with different numbers of votes.
This is not a democracy or a republic.
The purpose of the executive branch would be to negotiate with the legislative branch. Getting elected president was meant to be significantly harder than it is today. Back then, you couldn't just say "Hey, I'm the Republican, and this is the Democrat" and people would be stupid enough to say "Okay, I'm only voting for the Ds or Rs". You would have to represent EVERYONE.
In comparison, today's standards for presidency are much lower than what they were back then. BEFORE, getting elected president would mean you had significant support from many MANY different views and represented interests in multiple states.
So yes, the president was intended to prevent the legislative branch from passing bills the people didn't want, but it was also much harder to control the legislative branch and the executive branch and the judicial branch. It was meant to be impossible for that to happen but look at us now.