Some tips after watching your gameplay, if you'll have them:

Rotation - Don't go into a fight that you know you'll be outnumbered and can't win. - Help your team to balance fights by keeping a look out, if you are fighting a 3v2/3v1 then your other teammates are likely getting out numbered on another point. Do some damage and quickly do assist your other location. - Leave downed bodies to bleed out unless they are thief, ele, or ranger (Sometimes you should finish off guards too unless you leave them really low) - You don't need anymore than 1 person playing with a downed body, your teammate(s) are probably getting outnumbered while doing so. - Try to observe the map so that once you know you've finished and won a team fight, keep a look out to see where the next fight is taking place and start moving or immediately go check to see if an enemy is approaching the other point you are holding. - Guard/stand on nodes when "idling" (Region between 2 points so you can quickly move to either) not the points themselves. - Try to hold just 2 points, going for 3 caps will spread your team too thin, if you just wiped the enemy team then you can try to decap their home and spawn camp them but it's still very risky.

Team Fights - Call target, call target, call target. Ctrl + T the target that is to be downed first, if your teammates are all attacking different enemies you'll down them a lot slower (if you guys don't get downed first). - If you are on TS communicating with your team etc, communicate to set up CC chains and combo fields/finishers

Ranger Specific - On power ranger, stay on LB and stay far away, only switch to GS if you have to. GS is good and fun until you are downed. You have 1500 range on LB with fast projectiles, no other classes have this (engi nades have 1500 range but are slow af) so use this to your advantage. - If you use healing spring, try to combo it with GS3 for additional heals. - For canines/wolves, usually their first attack when you summon them is a knock down. - Use your pet's first attack, LB 4, pet fear to set up a CC chain to allow you to burst them down/force out stun breaks.