What makes you think everyone has agreed to them?

You have elected a representative who agreed to them. Your personal opinion doesn't matter on the subject.

Many sanctions harm completely innocent people.

I think that there are missiles on the other side that are hurting people in more physical, fatal ways.

Of course. But fighting against the war shouldn't involve creating more harm.

That's a noble, yet completely impossible sentiment.

That is the point yes. We have collectively decided that assassinating heads of state was pretty bad, and moved on to applying sanctions, so that if they hit hard enough back, said innocent people do need to get rid of the leader or the system that got them in such a situation.

That's presuming that Russian people don't support they goverment, which is far from proved afaik.