Workplaces are often like sports teams. There are different players with different skillsets and different backgrounds and capabilities playing in different positions and with different purposes.
Sometimes there are superstar players who make everyone around them better, and sometimes there are players who bring the whole team down making everyone lose and making everyone worse off. Sometimes, everyone is just about average, but they do and achieve amazing things together.
In the vast majority of places, work is a team sport. The company thrives when the team collaborates and in a way that makes the whole greater than the sum of the parts. When the company thrives, so do the employees (with greater salaries, raises, pride, flexibility, better work/life balance, and related opportunities, etc.).
IMO, being a toxic employee is nothing to be proud of. If you're a lone wolf and can't play nice with others, fine. Everyone is allowed to be who they are and unashamed of that, but it does mean you should make different choices than the median citizen.
If that's you, then go do something on your own and respect those around you enough not to bring them down due to your presence. If you're unwilling or incapable of going out on your own, however, then you need to check your ego at the door and do what's best for the group around you. Toxic is a label any of us should want associated with us in any context.
If there are bad leaders or they're heading in a bad direction, that's something different and not necessarily captured by the idea of toxic employees (though, toxic leaders, maybe?).
There are those who see problems and seek to fix them, and there are those who see problems and want to make them worse by burning everything to the ground. Which will you choose to be?