Fallout New Vegas: is kill Mr.House a bad thing or good??

my first question is in the title and my other question is which quest causes you to have to go against the NCR because at first i went with yes man plan but as soon as i was done it told me that the NCR doesn't want anything to do with me anymore so i reloaded and went with Mr.House but he apperently wants me to go against NCR but i want to be with the NCR (btw the quest i am at is called "The House Always Wins IV") so he confused the crap out of me because if i went with Yes Man the NCR hates me but if i go with Mr.House they don't hate me but Mr.House wants me to go against them (might have understood him wrong if so pls tell me) if you can try not to spoil anything for me unless you HAVE to spoil something for me to explain but try not to make it such a big spoiler

thx in advance to anyone who helps me

it honestly doesnt matter dont do the main quests the only spoiler i have is that once you beat the game no reply credits and end then remake a character and yea

i didnt side with anybody i ruled new vegas myself -hurr flip-

My charactor ended up killing Mr. House & helping The Machines take over New Vagas after he was already declared ENEMY #1 by the NCR and that JERK Caeser kicked him out of the Legion for helping the NCR raid a strategic Legion outpost. REMEMBER neither The Legion nor The NCR will attack your charactor if your dressed as one of them which comes in handy during key parts of the game.