You need a bit of a relay management:

The best (paid) option is https://nostr.wine which also offers a filter relay that helps fight spam in your feed.

#[4]​ is doing an amazing job improving this tool!

Alternatively (or additionally) you could connect to https://nostrich.land/ (also a paid solution) by #[5]​

On top of that you should connect to wss://nostr.mutinywallet.com relay (just add this ‘address’ into your client - it’s free) — it broadcasts all of your events across numerous relays and helps you get heard.

These steps will significantly improve your connectivity while not applying too much pressure on your device (CPU-battery).