Every CRM vendor sells capability and every failed CRM project we look at had enough capability. The failures are about how the thing was introduced and what it was asked to do.
1. It was built for the report, not the rep
The most common cause by a distance. Management specifies the fields it wants in the pipeline report, those become required fields, and a rep now has fourteen boxes to fill in to log a call. The rep stops logging calls. The report gets worse, so more fields are added.
Start with what a rep needs to do their job, and derive the report from what naturally accumulates. If a field does not help the person entering it, it should not be required.
2. Nobody removed the old way
If the sales meeting still runs off a spreadsheet, the spreadsheet is the system and the CRM is data entry. The single most effective adoption intervention is to run the sales meeting off the CRM, in the CRM, from week one, and to refuse to discuss anything that is not in it.
That is uncomfortable for two meetings and then it is normal.
3. The data was dirty on day one
Importing four thousand contacts from three spreadsheets with duplicates, dead email addresses and no owner produces a system nobody trusts, and trust does not recover. Import less. Import the accounts that matter, cleaned, with an owner on each. Add the rest later or not at all.
4. It was too slow on a real connection
Worth testing seriously here. A rep in a car outside a client's premises on a weak signal has ninety seconds to log a call before they walk into the next meeting. If the mobile app takes forty of those seconds to load, they will not do it, and no amount of management pressure will change that.
5. Nobody owned it
A CRM needs an owner: someone whose job includes keeping it clean, fixing the things that annoy people, and saying no to field requests. Without that person it degrades within six months, and degradation is one way.
This does not need to be a full time role in a small business, and it does need to be somebody's explicit responsibility rather than everyone's vague one.
What good adoption looks like
Deals move stages without anyone being chased. The forecast in the CRM is the forecast management uses. A rep who is off sick can be covered because the history is there. Nobody maintains a private spreadsheet.
If any of those are untrue six months in, the problem is the process rather than the product, and changing CRM will not fix it.