a lot of times youve heard of advice do not show anger or stress when dealing with people.
while it might sound likee a solid advice,it could case long term negative effects
1 emotions start to pile up
similar to loyalty points at your local supermarket,unexpressed feelings build up within you even if unaware on daily basis.which is why
there are stories of usually nice people suddenly showing anger,getting into fights,escalating to point where in extreme cases police needs to get involved.
2 brushing your problems under rug does not solve them
by simply ignoring undealt issues they go away temporarily from our consciousness they in fact continue to remain as they are unless solved.
whether they may be related to personal relations,or something more technical such as slow wifi or broken lighting,get it fixed asap.

next time you feel stress,try to let out your feeling honestly and loud,so as to leave stress behind and start truly living your own life.
cursing can have positive effect, study shown while injury it helps reduce our pain https://www.scientificamerican.com/article/why-do-we-swear/