I'd say at least a combination of the following can be called toxic femininity:

• Prioritizing feelings over rational thinking;
• As a continuation to the above, having an overabundance of irrational empathy towards a person or group of people, which leads to bad outcomes;
• Disloyalty;
• Selfishness;
• Having the seemingly voracious need to not only express one's feelings, but also forcing others to listen, even against their will;
• Being problem-focused, instead of solution-focused

There are other factors, as well. And before anyone gets mad, I'm not saying all women are disloyal and selfish; I'm saying that they are feminine traits.

There are also positive feminine traits.

Such as being good at doing the dishes. Much appreciated.