Quick Explanation

So our protagonist has some powers that would seem nerfed in the last chapter. I would think the same.

1. He knows how dangerous his powers are. Last time he used he destroyed a million dollar training room

2. He has no control, so it's really 0-100. Nothing in between. He spent the last month washing dishes, no time using his powers.

3. Fire Sprinklers release a lot of water. Like hundreds of gallons

Also his fire body, so theres no more misunderstanding. It's like elastic fire if that makes sense. To put it simple he can get hit by some things while ignited. Like how Iceman is made of entire Ice and can still get hurt by shit, Meltdown is the same. Like lightning. Because lightning is significantly hotter then fire. It's a whole different type of matter completely. It's like punching yourself, really really hard.

I also think it would be boring if I just didn't have a realistic fight. Like Domino's power is luck. That whole fight scene kinda exaggerated that.

I like to let the readers come up with their own theories and shit.