Here is the issue:
With Mangle Rules ON (Fasttrack OFF) certain things are perfect: (max speed 350Mbps, best quality, no bufferbloat etc..) example:

However other things like other speed tests and real world download speeds from places like Steam, end up being capped at ~200Mbs example:

Mangle rules OFF (fasttrack ON) my quality and bufferbloat end up terrible like this:

However, the speed in other tests and realworld download speeds goes back up to max. example:

Now I know the router will route faster with fastrack ON, but why does the bufferbloat skyrocket with it ON? Also why does fasttrack being OFF effect only certain sped tests but not others?
Here are essentially my mangle rules:
mark connection, chain forward, New connection mark “PC” Passthrough on
chain forward, src address 192.168.88.214 (that is my PC) connection mark “PC” new packet mark “PC UP” Passthrough off
chain forward, dst address 192.168.88.214 (that is my PC) connection mark “PC” new packet mark “PC DOWN” Passthrough off
the queue is essentially:
Packet marks PC UP, priority 1, max limit 24M
Packet marks PC DOWN, priority 1, max limit unlimited
Packet Marks no-mark, priority 8, max limit unlimited
Any ideas?