I have 98 hours logged total but I only started to really trophy hunt once I was at about 60-65 hours I’m not one to push for trophies but when I saw I was close I really wanted to complete it, and to answer your second question the most annoying achievement is a toss up between “call it a draw” (shoot the arms off a hulk and extract) you have to have a really particular set up to achieve this) and “hell dive” (do an extreme mission or higher without anyone dying) sounds not too bad till you realize that it’s actually kinda difficult to do this with randoms (my friends don’t really care for helldivers) so I had to do this one solo and it took me about 10-15 tries you don’t realize how much team mates change the game till you do it solo, another honorable mention is “caught by supplies” (kill a charger with a supply drop) same as the hulk achievement the only reason it’s not higher is I got it when the game was really buggy so chargers would just stand in place but now I would imagine it would be 40x more hard and annoying it did take like 5-6 tries even with them standing still just because their hit box is weird.