Yes, it is a Republican problem. I voted for every Republican candidate for President from Ronald Reagan to Mitt Romney. It is the Republicans who escalated the partisanship. It manifested itself during George Bush's term with a bipartisan plan for immigration reform. Republicans were responsible for stopping it.
In 2008, was when the Republicans became hyperpartisan. Rush Limbaugh said that he hoped Obama failed. McConnell said Republicans would not pass any legislation Obama proposed. Then they started slowing down Obama's lower court nominations. That culminated in McConnell's refusal to hold hearings on Merrick Garland's nomination to the Supreme Court. Scalia's death occurred 8 months before the elections, yet Republicans concocted the idea that it should not be taken up until after the election which was bullshit.
Trump was not a President. He was a authoritarian who did not believe in checks and balances. He believed he could make up laws without the Congress passing them. He appointed a Supreme Court that has legislated from the bench and ignored the Constitution. We are still under attack as a country from Donald Trump. Our voting rights are under assault from Trump, our free speech rights are under attack from Trump and our privacy rights are under assault from the Trump led Supreme Court. We had the spectacle of Ginsburg dying a few weeks before the election and Republicans ignored the Garland precedent and rushed a nomination through.
The Republican party is seeking to take over this country and create a dictatorship. The Democrats have never tried anything like this. This is very similar to what happened in Nazi Germany that led to the rise of Hitler. Attacking foreigners, gays and transgenders are a part of this war the Republicans are waging against American democracy.