Or more to the point, the entire Linux or entire Free OS universe, based on experiences with Ubuntu.
You can use whatever makes you happy, but know that there are other options if you want to stick with Linux. The two features you cited (invert colors and zoom) are built in to KDE, so any KDE distro (Kubuntu, Suse, SolydXK, MEPIS, etc) would give you this out of the box with no tinkering.
Not everything has a simple solution, but neither is vanilla Ubuntu all things to all users. We have choices, and that means other distros or configurations may suit you better. I think it's worth investigating, but to each his own.
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