It feels like it's super easy to progress in ranks at the moment.
4/6 players on my team have currently gone to GM in the past week, and none of us deserve it
There are two issues at play here. The first is that we have reduced SR decay this Season and increased the rate that SR decay is removed when you win games in preparation for removing this system entirely for Season 4. This means that players are reaching their true ranks more quickly than they ever have in OW2. OW2 really does have a different metagame and emphasizes a different skillset than OW1 did, so it is inevitable that some players will find themselves higher ranked in OW2 than they did in OW1.
The second is that our first two seasons had a small amount of unintentional SR deflation, so we've mostly corrected that issue in Season 3. At the highest ranks (like GM where you and your friends are) we've learned we had an inaccuracy in our formula that resulted in an overcorrection.