Say it straight or don't say it at all.
A lot of people complain about behavior they quietly trained. If you allow constant interruptions, endless text conversations, and low-value access to your time, do not act surprised when that becomes the standard.
The second you stop expecting people to repay your effort, match your loyalty, or rescue your future, you stop living disappointed and start operating from reality.
Most people do not have a motivation problem or an energy problem. They are exhausted because they trained everyone around them to consume their time, attention, and mental bandwidth without limits.