Indeed.
I skipped last split / season or one before that as well because this stuff was just crazy - after like 8 PM on EMEA you as D4 just became cannonball meat for preds - 1-4 squads of clearly premades, often hacking vs D4 and lower random soloqers. Switched to Valorant for 3? months in the beginning of this year, enjoyed matchmaking there despite it not being perfect either.
Now this stuff happens only after midnight for me on regular basis, yesterday grinded a lot, stayed up late and after like 1 AM me as D3 was regularly in similar lobbies: 6 masters = two 3stacks, most of them with at least one wallhacker (obvious on the team), one in ~5 games Preds came on from all accross the board (remember playing vs #460 something as well as #sub 30, 20 something) and it really makes you wonder (laugh) about posts regarding skill based matchmaking = hard to believe that 3stack with hacker(s) on the team would have the same result as me battling for 4h with brainless soloqers that 2 out of 3 times as soon as WE came into rotation drop Fragment into 4+ teams and instadie... yeah right.
Well on a bright side - I gave some Masters / Preds a boost (maybe they stop playing now) as they without an exception!!!! hunted me down as soon as my teammates created distance between us / died and I had to rat. Their wallhacking is just sooo obvious and Respawn just does not give any F#%^ about that nor above mentioned matchmaking. Gladly it just happens now at night = motivation for me to stop playing and go to sleep :)
I would be actually ok playing vs legit masters e.g. yesterday somehow game decided to match me with 16k current master and other D1 player (neither was in a party, we were just 3 randoms) = I outperformed both of them, they were just as lost as any other D4 player, maybe a bit more inclined towards teamworking, yet when we had to clutch there were no coms, pings etc. Just made me wonder how long did they grind to get to 16k as I barely broke D3 after like a week's grind, really tried yesterday and it worked.
What I am trying to say is that "legit" Masters on a lower level is exactly the same skill level as D4 that has brain, skill but is soloqing and maybe not giving it all every game.
But Preds are just killing it for me, make me stop playing as they either on different level or as clearly seen in many cases just hack, abuse game mechanics, graphics and it is like fighting against a person on steroids while being natural.
And I would assume Respawn had to make adjustments to EBMM not to create lobbies like in good old days where Preds actually played mostly against preds, queue times were like 10 min+ and it was a grind for them. Nowadays that would lead (already has lead to) streamers and pros playing vs blunt hackers -> losing RP, not putting out content with highlight shorts and creating situation like in one of Zeu's videos where in Oceanic server top 5 teams? in last zone were all wallhacking and it was "funny" to watch how hackers prefire hackers and try to figure out how to win now a game were everyone knows everything :D