Was what the devs did great? No. Does the whole project need to be outcast/abandoned due to what language they use? No. There needs to be nuance with these issues. Open source does not owe individuals anything and that is why it is provided without warranty. On the flip side, individuals can choose not to use it.
We should be promoting open source software and not have infighting when open source software doesn't have much mass market appeal to begin with.