you could say “es desesperante” although that’s a bit strong. but it works in this case.
“fastidioso” or “molesto” mean annoying but they don’t have the same nuance and implications that annoying has in english. so you just have to come up with the right phrase for the context. In this case, it’s the phrase at the top ^_^
Put that energy instead to achieve your language goals ^_^
Think about which language you want to learn the most and work really hard at it. Take classes, meet people on the internet and talk to them, in real life, stuff like that ^_^ then you will be bilingual! and that’s a big deal. buena suerte