Hey. I'm a legendary eagle. Few of the biggest tips I can give:
Economy:
-Always look at your other team members cash before buying yourself. Never buy if two or more of your members have to eco.
-T side loss always eco twice then buy (pistol round)
-CT side loss always eco three times then buy (pistol round)
-When play CT, try and defend with a shotgun (sawed/mag) to get the $900 bonus/kill
SG/AUG:
-Never zoom in close range for enemies. This is one of the biggest mistakes I see people doing.
-When zoomed in, take short bursts. NEVER spray while zoomed.
Desert Eagle/Scout:
-Both of these weapons are skill weapons, meaning they both require you to get headshots.
-If you can't land headshots, dont use them. I'm a legendary eagle and I'm still too noob for these weapons.
Misc:
-Always buy armor before weapons, unless you are ragging an awp (provided you are good with it)
-Try and make friends and play with them. CS:GO (like LoL) has many afkers, elo boosters, and idiots
-Practice your aim
-Switch your locations, don't become predictable