This is a very interesting standpoint.

I personally believe that having lots of parties founded on concise, coherent principles would be very nice from a voter point of view (to express preferences), but those would be completely unable to actually govern-- because there are a lot of decisions to make and compromises to find, and trying to do this solely based on a small set of principles is just not possible, because you would need to abstain from all decisions that your founding principles can not answer clearly (and no current democracy is set up in a way that enables this).

I can picture a system where this could work in theory (lots of parties forming the government, but most parties abstain from voting on any single decision), but I can see no way of preventing scope creep/consolidation...

Regarding the "both main parties equally bad" aspect:

What are your main pain points with the previous administration? As an outsider, to me it appears that despite getting dealt a rather bad hand (Covid/Ukraine/Middle East chaos), they made a lot of correct decisions (in hindsight).

Post-trump republicans, on the other hand, appear irresponsibly selfcentered to me in many ways (climate/emissions, Covid policies, foreign/trade, anti-pluralism). I also think that (2016) Trump poisoned political discourse in a insidiously harmful way, by basically forgoing any form of factual debate in favor of spewing insults at every opportunit (lying Hillary, sleepy Joe, ...)-- this alone I feel almost requires opposition...

What issue would your ideal party tackle first?