There are a few glaring issues,
Firstly, move all of your teleport_destinations, and also the teamspawn down to the ground, so you don't free fall for half a second each time you fail a jump or when you spawn in the map. These both need to be at least 1 unit off the ground otherwise players will get stuck in the ground.
Secondly, you need to cover all of your jumps with an entity called trigger_hurt, and set the Damage and Damage Cap values to large negative numbers (-1000 is fine). This prevents players from dying to triples, etc.
Other random stuff:
Tele (-1536 -3584 9188) on whatever number jump this is needs to be rotated. Just change pitch/yaw/roll to 0 270. Next jump has the same issue.
Same jump has skybox sticking out by a few units