How does the difficulty of reaching CSR 50 compare to reaching level 50 in Halo 3?

I apologize if this has been asked before. I don't frequent this subreddit much. I have two accounts that I play on (two different houses/locations). One has a CSR 38 in Slayer, the other a 20. Obviously, CSR's 38 and 20 are not CSR 50, but throughout the games that I have played I haven't noticed any obvious increase in opponent skill level. This, I have found to be very disheartening. As well as the fact that I hit CSR 25 after only 6 or 7 games.

During Halo 3's prime, most of my enjoyment came from grinding for hours in ranked playlists trying to get a 50. I haven't played much Halo 4 since the CSR system was implemented, but the games I have played suggest that reaching CSR 50 is easier, and that I won't be facing the caliber of opponents that I enjoy playing.

So, if anyone that currently has a CSR 50 would give some feedback I would appreciate it. Thanks