BASH is like Obi Wan. It isn’t the most powerful or flashiest, but it survived a long time, where others didn’t, for very good reasons. Bash runs basically everywhere. It has many modern features you wouldn’t expect. Its syntax is literally what you would type on the command line if you were diagnosing or fixing systems so you don’t need to transpile to another language. Its reliance on other programs means it is glue and can easily incorporate highly cohesive functionality/tools others write and maintain. Also, it’s been around and is everywhere so you don’t worry about trying to incorporate the current latest and greatest declarative tool (which will blow over in 5 years) into your other workflows. Basically, don’t disparage a Jedi/tool that has survived where others didn’t. There is a reason.
Also, use shellcheck. Incorporate it into you editor. Fix all warning and don’t ignore them. This will push you deep into bash syntax rabbit holes but you come out better the other side.