The Limit Problem, Clearly Stated
A "limited" account at a soft bookmaker is one where the bookmaker has reduced the maximum stake you're allowed to place. This can range from a mild restriction — your maximum on certain markets drops from €500 to €100 — to a full "gubbing," where you can place bets of only €1 or €2 across the board. The restriction may be market-specific (you're limited on football but not on horse racing), or it may be account-wide.
Importantly, bookmakers are entirely within their legal rights to impose these restrictions. No law in Ireland or the UK requires a bookmaker to accept a bet from any customer. The terms and conditions you agreed to when opening the account explicitly state this. Complaining formally or threatening to close the account rarely changes anything — the restriction is algorithmic and the bookmaker has no commercial interest in removing it.
The psychological impact of restrictions should also not be underestimated. After building a profitable betting operation at a bookmaker over several months, having your access cut off is genuinely frustrating. Many bettors respond by opening new accounts (which violates terms of service and gets them banned entirely), trying various workarounds, or simply becoming demoralised. None of these are the right response. The correct response is to redirect your operation to platforms where this doesn't happen.