It would be that I avoid using french, my native language, as much as I possibly can. I actually know the reason for that.
First reason.
I associate french with christianity since the french speaking citizen of Quebec have been under the rule of religion for a long time. This actually scarred the province greatly since the french Canadian didn't have access to good education, only religious one, it made them pretty much slave to the english-speaker who could get actual education and become buinsnessman where as french Canadian could only work low paying job. The scar of the religious past of Quebec are still hurting Quebec, Quebec is currently amoung the poorest province in Canada and though most people don't value christianity much anymore, there is a lot of racism against people of other religion, especially muslim. I also despise religion in general for numerous other reason that I won't list because it would take too much time.
Now for the second and more important reason.
Back when I was younger I used to consume every media (almost exclusively youtube video in my case) in french since I didn't speak any other language. Since France has a much bigger population than Quebec, there is an overwhelming amount of France's french video and French's creator are also much more popular than Quebec's creator on youtube so the french media I was watching was almost entirely made by French.
At some point I realised that I had started to use a lot of French expression in my daily life and much less Quebec expression since I didn't talk to many people and didn't learn Quebec's expression. That realisation made me very angry at myself since I don't consider myself French in the slightest and this also happened during my phase were I was a very partiotic Canadian. I actually don't acknowledge France as the "Motherland that developped Quebec". From what I learned in history Quebec under French rule was misery and Quebec and Canada only started to grow when the British took over.
After this realisation, I stopped watching any french media altogheter and started to only watch english media even if I wasn't good enough to really understand them. This event is actually what led me to learn english and got me more invested in online communities, which is where I found all of my passions.
The first community I got invested in was heartstone. Through heartstone I found about nightcore. From nightcore I discovered the greatness of music in general and got introduced to anime, which led me to start watching anime. Anime has led me to discover a lot about myself and made me find the euphonium. The euphonium revived my interest in band music and got me more interested in every non-lyrical music as well as instruments in general.
It has now been perhaps around 4 or 5 years since I last used french on the internet and though I am not as opposed to use it anymore, I am still very reluctant, in fact everytime I see french a strange sensation that I dislike and can't really explain fill up my body and make me advert my eyes frmo the screen before I adjust to the language. And the quality of my french has decreased in my daily life, I am finding it much harder to express myself in french because I lack a lot of vocabulary (and english's vocabulary is also much wider and complete than french's one)
That turned out to be a lot longer than I planned it to be.
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Are there things you avoid for no good reason?