I have solidarity with social democrats, democratic socialists, market socialists, democratic confederalists and anarchists.
I do not have solidarity with Marxist-Leninists. They are everything wrong with the left. There is no common ground to be had with them.
The secret is the erosion of the welfare state, high unemployment levels, butchered unions, dropped funding for non-profit hobby/sports organizations and money laundering of tax money into "profits" through a messed-up voucher system for schools and hospitals.
Not to mention the extremely corrupt law of public contracting that always results in the lowest-bidding - and thus shittiest/sloppiest - business getting to do all infrastructure work (and inevitably messing it up and then charging extra for fixing their own mistakes). Ironically, that law was intended to combat alleged corruption. We had very low levels of corruption before that law was made.
TL;DR: thorough neoliberal destruction of Swedish society.