I'll maintain the idea of the coalition in itself wasn't awful - ultimately the Tories were the biggest party and the only one who could form a government, and it was inevitable that compromise would have to be reached in that regard. The problem was that the Lib Dems didn't push anywhere near hard enough for anything that mattered. Voting reform to PR should've been a demand from the off - they should've also requested more senior cabinet positions. I'd argue they should've tried to neuter austerity much more than they did, but then the problem was that Clegg and a fair few within his party were actually quite right-wing anyway, only really disagreeing massively with the Tories on social matters.