once you've ruled out your own network as the cause of your grief, it could be your provider's network. fibre should not be so far off from the service you're paying for, pero depende kasi sa dami ng client in a locality, at sa provisions ng provider sa bawat client. dito pumapasok 'yung congestion at kung anong ginagawa ng provide to manage this.
a couple of things you can try:
- run speedtest from the speedtest app (rather than a browser, dahil maraming nakakaapekto sa behaviour ng browser)
- check with your neighbours na merong similar plan from the same provider. kung pareho ang resulta sa kanila, nasa provider ang problema, at solusyon d'yan.
to be honest, if you're getting a consistent 100 Mbps, typical usage and application should be perfectly fine. ano ba ang gusto mong gawin na nalilimitahan ng current service mo?
of course, kung ok naman ang pinag-gagamitan mo ng internet sa 100 Mbps... sayang 'yung bayad mo ng 300 Mpbs service.
a 50d/10u Mbps fibre service should be much more reliable than any 4G/5G fixed wireless service kung walang issue (congestion, etc.) ang network ng provider.