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.
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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