1. To voice, act upon, or generally be the essence of, an opinion that is offensive, discriminatory, repressive, divisive, and/or in opposition to the status quo (known for use in progressive politics).
2. To cause conflict in a social setting.
3. Can be used as a full sentence to display something that fits def. 1 to such an obvious extent that it shouldn't need to be explained.
1.
When talking about politics in 2020:
"This election is extremely problematic. I don't know what I'm going to do."
2.
After spilling tea you knew you shouldn't spill: "Omg, I'm so problematic"
3. Scrolling through twitter and you read "..look I'm not saying assault is a bad thing...'
"PROBLEMATIC"