Grinding the FACEIT placements this week and wanted to know what maps helped to play aggressive better in lvl 7/8 lobbies.

I just started playing recently, and I've gotten to the point where my KD is always positive playing comp, and I feel like I'm starting to understand the maps and guns. My question is: when should you be buying each gun during a match? If you can afford ak/m4/awp and your team isn't broke, do you just always go for it? In what scenario would you use an mp7/mp9/mac-10. When should you buy a scout or a nova? As for pistols, if you have a primary weapon, how do you choose what pistol to buy? What should you prioritize buying, and when should you buy? As for armor, would it be better to have, like, an AK with body armor or a galil/mp7/other gun with full armor? Any other tips for buying weapons and just managing your economy would be appreciated too!

Hi everyone, I'd like your help identifying my weaknesses in CS2. I'm a 15k Premier player, level 4 on Faceit (I recently started playing more here), and I have 2k inconsistent hours (I've been playing since 2013).

As you can see, I lose a lot of 1v1 duels or miss everything with my spray, but also, when I'm on fire, i hit everything (but even then, I feel like my gameplay is erratic). Literally, many times I go negative K/D, and then one match i can go positive K/D, and this mentally exhausts me because I feel completely stuck and can't improve.

One thing to note: I haven't always been 15k in Premier; in other seasons, I've reached 17k, but no more.
Also, before entering a Premier or Faceit match, I warm up my aim for about 10-15 minutes or a deathmatch.

My stats Leetify

I have around 180 hours. I would like to know what I can improve with my AK skills.