A positive expected value is not profit. It is the average outcome of the same bet repeated many times, assuming the model is right. It says nothing about any single result, it does not compound into an income, and a run of losses is entirely consistent with it.
The model is not better than the market. Major-league betting markets are among the most efficient consumer markets that exist. They price team news, injuries, motivation and money flow. This model prices none of those. Where it disagrees sharply, the model is the more likely to be wrong.
This is analysis, not advice. Nothing here is a recommendation to place a bet. Staking figures describe a mathematical fraction of a hypothetical bankroll, not a suggestion that you should stake anything at all.
Only ever risk money you can lose. Gambling is not a way to make money, recover losses, or solve a financial problem. Betting is 18+ (or the legal age where you live) and is restricted or illegal in some jurisdictions — that is your responsibility to check.