When I think of 'conservatives' I think of people like Mitt Romney and Malcom Turnbull, people who want to grow the economy by reducing government spending and imposing fewer limits on business.
I think a better name for Reagan and Trump supporters would be 'regressives', people who want to regress back to a time where white, male landowners had all the wealth and power.
I personally know of US conservatives who voted for both Biden and Harris because they were more closely aligned to their values than Trump.
The way I view progressives is as investors. They want to invest in people and infrastructure to grow the economy and look after all people.
I do strongly disagree with you that neither side has solutions... I think both sides often propose very workable solutions on a whole range of issues, the problem to me is that in two party systems, there are incentives to block any proposed progress to score political points and deny your opponents any success (which in a normal world should see you voted out by your constituents).
I get your disagreement with the "no solution" comment and your explanation is why neither offer real solution - they cannot practically do anything of any real value, no matter the ideas they have. That isn't a solution, it is well - nothing. Two party, or 10 party systems don't work. There should be a singular group with changing members, with the core goal of improvement of wellbeing, whatever that requires.
Essentially a group of benevolent dictators? It would definitely be dramatically more efficient... but you lose the checks and balances that 'should' prevent, say, the singular group waging a genocide on a portion of the population.
The CCP is a pretty good example of exactly what you're describing... they've achieved incredible infrastructure that are impossible for most other countries... but they also disappear journalists, critics, enslave minority groups and bulldoze anyone that gets in the way.
Governance is just so hard to both get right and stay right. People are kind of the worst.