It’s only bad when used incorrectly. Just store time in UTC and convert it to timezone of your setting to present it. Most modern languages offer a library that makes it just one more line of code. Not only it’s then clear and unambiguous, it supports all timezones.
Mint is great and is absolutely enough for most people using computers, still as of now. It comes with its limitations though:
All of the above can easily be irrelevant to you and Mint is just perfect for what you need. It’s important to point out limitations of that choice, but crapping on it because you don’t like it is just pointless fuss