How do you deal with poor data quality in a CRM?

I work for this large company. And the data quality in our CRM, which is Salesforce, is a bit of a mess. Actually, scratch that, it's a total mess. It's so bad that I struggle to even segment our clients properly or pull up lists of who we're actually serving.

The root of the problem is a mix of things. Firstly, our Salesforce setup is way too complicated. The company thought it could do it itself, and well, it didn't go as planned. Then there's the issue of our account managers not keeping their client info up to date. Some of them are just lazy, and others genuinely don't know what they're doing.

I keep telling myself that maybe other companies deal with this too. Like, I'm trying to find some comfort in the fact that we're not alone in this CRM chaos.

So, let me ask you: How's your CRM holding up? And if you manage to fix it, let me know! How on earth did you pull it off?