Do Grumpy family members make u Grumpy?

We all have in most  families a parent/ parent in law / grand parent or an uncle or an Aunt and if not them,then a next door neighbour who is Angry and Grumpy without a reason. There age definetely demands care,respect and compassion but their selfish,unkind and rude behaviour really bothers us and at times we can not separate our physical zone to have the stentch of that prideful , painful, irresponsible and hurtful speech , action and expression they extend towards those subordinate to them in position,finance, relationship or hyrarchy. I have corrected lovingly one such close proximity co habitant ,at times i have been stern with them ,at times objected to their uncalled for ruckus on trivial issues and at times stopped talking to them too.The other day their disrespect towards a lower staff made me loose all my cool and i said to them that they are Wicked!…as soon as I said this i realised how wicked was i not to be mindful and respectful for the elderly person. It’s may be bodily pains ,loneliness or the struggles of life which made them so sad and Grumpy that they can neither vibrate calmness nor peace. Do you come across such Grumpy oldies? How do you deal and react when these unkind loved ones are unjust with someone?