You can slice and dice these last 4 months any number of ways, but the net result is basically, one step forward, one step back, two steps forward, two steps back.
You chose to draw a line at June 15 and point out that the Brewers are 33-23 since that date. Someone could also say that those 56 games have two distinct sections. In the first section ending July 26 when they finished their season series against the Reds, the Brewers were 23-12, highlighted by going 7-2 against the Reds. Since then they have gone 10-11, so definitely not hot.