During the Reagan administration I was in elementary school, so I wasn't particularly concerned with politics. But I don't think people were angry with the GOP then for a few reasons. Most importantly, the country was doing very well economically and militarily, so people were still in the mindset that the country could afford missteps here and there in terms of policy compromises with the Democrats. The debt grew under Reagan, but so did GDP, and by a huge amount.
It's also true that there was a different class of Democrat back then. The party was still largely that of the "old school" Democrats. It was not under total ownership of radical leftists, heavily informed by Marxist theory, like it is now. Further, I would say that there was a certain naivete in play then. People were still willing to believe the Democrats would be good faith negotiators so, you know, go along with them on this tax policy and they'll agree to spending cuts elsewhere in the budget. How many times now has Lucy yanked that football away?
Think back to all those times earlier in life where you heard different variations of the warning that went something like "if things keep going like this". Those were warnings uttered in the assumption that any consequences were still comfortably in the future, some other generation's problem, and surely the course will have been corrected before things get that urgent anyway. Well, we are now at that moment. There's no more "if things keep going like this", no, things did keep going like that. We are now at that unknown destination in uncharted territory.
At this point, what could possibly be done politically to avert disaster? Can we even appreciate the scale of what would have to be done? We would have to wholesale eliminate entire cabinet departments, eliminate entitlement programs, and so on. The voters of this country are like the screaming toddler in the store -- no matter how many times Mommy says no or even tries to explain that the coveted toy is too expensive, all our infantile population knows is that it wants this, it wants that, and it doesn't care or even comprehend why it shouldn't.