True... if you suck at Bash.
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Bash unequivocally sucks this is not to say it doesn't have its uses.
No, it doesn't suck more than YAML-based scripting. I write complex Bash scripts daily - if I have to write the same in, let's say, Python, it would take longer, will possibly run slower, and will definitely take longer to test. Again, Bash is a nice tool, but you need to learn it well.
how do you test bash scripts?
I've used bats[1] in the past. I also recommend the command line shellcheck[2] for linting.
[1] https://github.com/sstephenson/bats [2] https://github.com/koalaman/shellcheck
Sorry but the question is not if you suck or not at bash. The issue is that there's always someone else that DOES suck at it, in unimaginable ways, and the regular guys like you and me have to deal with it. And there, Ansible helps!