I've felt a lot of "false" positivity espoused by project managers, especially those in charge of agile ceremonies. Examples: "I'm really {proud,impressed} of all of you for your output this sprint", "You guys are {killing,crushing,owning} it", "You all should be very proud of what you guys did", etc. These aren't given after periods of crunch time, they're literally every week to the point where it feels so contrive…
"You guys are {killing,crushing,owning} it" I say this to my team a lot, even though they're operating as "expected" levels for my company. The reality is there are a lot of teams and a lot of companies that simply do not expect much from their teams. We do. I want to remind the team that they are doing good work. When people have confidence they're doing a good job, they're more likely to continue to do a good job.
give real praise only when it's deserved. support and compassion, however, should always be readily at hand.