Or maybe you are underestimating how much the Senators have improved, and maybe we would be beating up on other teams around the league too, if given the chance.
Totally, the team looks much better than they did for the first ~15 games. Actually, although they were far from perfect, they were already decent at home and just continued to improve but since April, it seems that they have been able to figure out how to defend on the road. Look at the GA/GP on the road :
January : 6.00 GA/GP (in 5 games)
February : 3.71 GA/GP (in 7 games)
March : 4.83 GA/GP (in 6 games)
April : 2.71 GA/GP (in 7 games)*
May : 3.00 GA/GP (only 1 game)
* a 3 games stretch mid-April where Murray came back from injury, gave up only 2 GA in 3 GP, that was on the road.
So, not only the young guys have improved and added a bit of experience, but the personnel mistakes made in the off-season (Dorion is the GM but DJ certainly has a part of the blame in this) got progressively fixed. The coaching staff seem to have also finally worked out the structural and hockey systems problems. A lot of added speed certainly helped but we don't see as many blown up coverage (positionning, rotating) and deadly turnovers (breakout strategies) and most importantly, we don't give up as much time and space. The amount of time and space we were giving up early in the season was ridiculous, not sure I ever saw it as bad. Not a surprise goalies were getting shelled. You can't give up too much time and space to NHLers, these guys are extremely good at hockey and will make you pay
To the Sens/coaching staff defense, many guys hadn't played in like 10 months, there was a ~50% roster turnover (~10 new guys) and there was no real training camp. The team was not ready to compete and that's why we dug our hole early.
But now, after the storm, this team is finally "hard to play against" : fast, relentless and skilled
Sure, there's still room for improvement (Tierney, Dadonov, defense...) but we're seeing the light at the end of the tunnel. The big difference to me is how much faster we play and execute. It's not really about being physical, just be strong in battles and don't get pushed around. Players like Tkachuk and Connor Brown are pretty good role models at how forwards have to play