DR, matchmaking and penalty system are so broken lol. Another example just from my race notes
12:00 S17 F05 8:30.234 SR 99 DR 47244 No Stop, Lexus 17, CRB, Great race
12:30 S15 F09 8:34.957 SR 86 DR 46626 No Stop, Lexus 17, 2 x 5 sec penalty from track re-entries, brake checks, rammed off at the end
13:00 S13 F02 8:32.541 SR 86 DR 46557 No Stop, Lexus 17, FL, Dirty chaos lap 1, bumped bumped bumped, rammed off lap 2
Two BS penalties from track re-entries in the middle of traffic (nowhere to go) touching me and crashing again, of course 5 sec since my DR is so high send me to the low SR.S room. I was the only DR.A there. Normally when you qualify you get an easy pole to flag victory (Nearly everyone pitted and first was only 8:23 qualifier). However from the back, chaos, cars coming from everywhere while getting bumped all over the place. Then in lap 2 a Brazilian rams me into the wall, and thanks to the DR difference he only gets 1 second. Still plenty to pass him at the penalty zone but lost my run on first and -70 DR for finishing second. Neutral SR from all the bumping thus back to the chaos room.
Now if I had been disconnected in that room with all B C and D drivers

That's up to 3,040 DR lost.
Starting 14th of 19 next, two other DR.A in the room this time.
Phew, out of the danger zone, back to the high SR.S room
13:30 S14 F01 8:27.465 SR 91 DR 46790 No Stop, Lexus 17, FL, Chaos lap 1, 11 sec lead at finish