Whining about a for-profit product no longer having a free-tier is odd to me. Either be fine paying for the service (nothing wrong with that) or pickup software that is free; I for instance personally use org-mode and Emacs heavily for all of my personal information management.
I also do not understand the sentiment that every product acquired will slowly begin to suck; that happens for some products sure but the converse is also the case.
To be fair to Atlassian, I used to hate Jira a lot but in recent years had to use it for work and it quickly grew on me; they are putting effort into improving their services / products, modernizing their software development processes and technologies, and delivering updates to their software on a regular basis.
If you're going to contribute here, please be more constructive or detailed. Why not talk about your ideas for a project that is free that anybody could install on their servers that does what Trello does if you do not like that they may begin charging for Trello?