and the Condorcet method can completely fail to select a winner.

That one’s not a flaw. All elections can suffer from ties. Pure Condorcet just makes it obvious when there’s a tie (and this is very rare). There are a bunch of Condorcet completion methods for resolving the tie.

Have you tried https://star.vote? It’s a better voting system https://www.equal.vote/star_vs_rcv

You probably mean https://www.rcv123.org/? But that uses Hare’s method, which is pretty flawed and won’t always pick the candidate preferred by the voters.

Better to use https://star.vote/ (score ballots) or https://civs1.civs.us/civs_create.html (ranked ballots).