What would be considered to be toxic leadership?

A leader who claims to respect soldiers, but yells at them. This leader completely changed the culture of the unit.

Toxic leadership also rears it's head when leaders have bad attitudes due to being passed over for promotion, disciplinary actions, are just close to retirement and don't care, or other reasons. They tend to complain about their leaders to subordinates (as a leader, complaints go UP, NEVER DOWN), do the bare minimum that is required of them, and worry only about themselves, and tend to throw their rank or seniority around, rather than earn the respect of their soldiers. I have had leaders like this and worked with fellow NCO's like this, and they can wreak havoc on morale and discipline.

So there we were in Camp Speicher, Iraq. The CAB CDR decided that he would institute CAB REG 670-1 and make everyone wear the Big Red One as a combat patch. A reservist augmentee refused (as did quite a few of us) and wrote to Stars and Stripes about it. It earned a two pager. There was backlash and talk of Article 15 and then again, another two page story in the Stars and Stripes. The DIV CDR had to put out a policy to reinforce the right for Soldiers to wear (or not wear) the SSI-FWS of their choice provided they had earned it. The response? The CDR and CSM put on their first combat patches (82nd and 101st if I remember) and went around the chow hall with their right arm outstretched, putting their patches in everyone's face and grinning like fools.
From then on, they lost something by acting like 10 year-olds rather than professionals. In reality, if they had asked me, rather than ordered me, I would have happily worn the BRO every day. (I swapped out with my 1 MARDIV every other day to honor those who fell in Ramadi as well as support my current command)