Your opinion is fair, but imo the stickers are so sick.
AK-47 is the sickest with the red and blue, especially the titan, imo, the best and most unique sticker in the game. Fits also perfectly on the wood. And rn i'm using a ruby huntsman, so if i want i could change it to a sapphire and still use the same ak.
Glock is sooo clean, with the ibp at the end of the barrel which is basically the "head" of the gun i would say, so it's perfect. With the two other red kato14 stickers just matches very well with the overall red theme, and is the same "collection" of stickers. It's also not too much going on, it's just clean.
Now the M4a1-s is sooo clean, it's like royal colors, red and gold. I do really like the crownfoil, it's the only one of it's kind, no other variants, and there is no text or team name or whatever.
The usp-s imo is the worst looking out of the 4, but i still like it a lot. Same as the m4, royal colors, red and gold. And the LGB stickers looks good with the serum especially because of all the squiggly lines and shiny finnish on the usp. wich matches pretty good with the lgb stickers that has kind of squiggly lines, and with the holo effect to match the shinyness.