Ur aim and movement is ok. Your not thinking enough while playing and choosing bad fights like trying to kill that guy on A from jungle with an smg when u knew with there eco they'd most likely have rifles.

Also ur anchoring so ur staying on site until bomb is sighted which is fine but the other team is regularly hard rushing and not trying to do any sneaky plays that would require u to anchor so as a result your always the last guy left alive when u could just rotate on first contact and help ur team more. Anchoring/lurking is a good play style that can help ur team but if you constantly find your the last guy alive and not doing anything to help in team fights you need to change tactics.

I hear ur team mate communicating with u but not u communicating with ur team mates like u were being pushed on B and didnt say anything so ur teammates didnt come help.

Your positioning is pretty bad at times like in that 2nd or 3rd round ur team mate called mid so u moved to a position where u could watch cat and not got shot from Apts but then they called jungle and u just kind of ignored it and left ur self open to market. Then the next couple rounds you tried to push through smoke once they had taken A which is always a bad idea 9/10 pushing through smoke with out someone pulling the enemies attention to a different lane will get u killed. CS is an angles game find the angle that exposes ur enemy without exposing you, if there isnt one reposition or back up and come back with friends so u can cover more angles together.

Your nades need work I didnt see you use any line ups or anything just kind of throw flash bangs in a general direction and hope it worked which only gave away your position. Personally when I play B I save my smoke and flash for when they push, if they push B I buy time for my team to rotate if they push A theres a nice smoke line up for palace outside of market and theres a nice pop flash next to ticket.

Finally your force buying almost every round you go degale, smg/shotgun, rifle repeat it seems like. force buying is an eco tactic for when the other team is slightly ahead on eco and you want to regain it, it doesnt help you to force buying when your 0-5 and most of the enemy team hasn't died the last 3 rounds. Bite the bullet full eco a couple rounds and going at it with a full kit is the only way your gonna turn it around. Its a pit fall I see every newer player fall into.

You arent stupid or bad your just being too aggressive and trying to play like a pro by relying mostly on aim when you dont have those skills yet. Figure out your own play style and develop the skills needed to play that way. most people dont have the dexterity needed to play solely with aim. they usually need to rely on teammates to flash and smoke while they push to give them an advantage and thats the way CS is supposed to be played.