As an MSP Coretelligent inherently has poor QoL due to the nature of the business. This is standard for the industry and expected to an extent. However, management has taken to pushing numerous policies which affect staff (engineers primarily) negatively. Some examples include: alternating overtime bans with mandatory 12 hour work days (because people don't put in enough overtime during the banned overtime periods?), setting unrealistic maximum travel times between clients, mandating 8 hours of billable time for remote work (when time is tracked to the minute, this results in either padded time entries or absurd work hours), tracking internal chat logs (used as evidence to punish people) and various others.
Probably the most consistent thing that has happened with Coretelligent over several years is empty promises, if you speak with management things like training, being horribly understaffed, and general QoL changes are "right around the corner". It's been this way for years, the only recent good change was legally mandated overtime which was then banned once they realized how much it costs. Pay and promotions seem to only be increased in response to threats to losing employees.
Management is more than happy to find scapegoats for any larger issues that occur. You will never actually be trained in anything so hope you don't screw up while trying to figure things out or you'll find yourself fired in a heartbeat. There's a running "joke" that there's no point in meeting new people for a few months since they'll most likely be fired before then.
There are various other "smaller" issues that need to be sorted out as well, the company is at the size where business hour engineers should not be doing on call, additional hires have been made to cover some afterhours but not all. It is a week straight where you can't be more than 5 minutes away from your house and regularly lose sleep dealing with issues like wrong numbers, false alerts, or any minor issue that a person decides needs to be addressed at 3 in the morning. This also happens on sometimes a one or two week notice requiring you to cancel any plans. The engineers are horribly understaffed, and while they are held to very high levels of accountability, it seems that does not apply to any other departments and you will regularly need to run damage control on issues caused by procurement, scheduling, management, etc. It's very common to have time off denied and sick time is fought back on regularly.
Please, look at the 5 star reviews on Glassdoor. There's a reason they're posted within a week of each other, it's a threat response to reviews like this one that they're scared of potential hires reading. I'm sure HR will respond to say saying "they care, this isn't accurate, blah blah blah" There's a reason multiple of these reviews been cropping up lately. This part year especially Coretelligent has taken a severe nosedive in how they treat their employees and as of yet there are no signs of change.