I bought some waterproof over trousers (Rab Downpour) which have full length zips, so you can actively vent the inevitable hot air, access your main trouser pockets, as well as don and doff them really easily. I'd always carry them, but hardly ever wear them because it's still a faff to stop and put them on.
So I recently bought some Paramo Velez, which use their Directional waterproofing system which is worth looking into. The idea with these is that they're waterproof trousers you wear as your main trousers rather than to wear over something else. They are however not good for going through undergrowth as the shell material is thin and will get damaged. They also run warm because of the thicker nature of the materials, but have lovely open thigh vents to vent. They're really taught me that breathable materials are never breathable enough, and I need actual ventilation options (preferably with mesh to keep bitey critters out, but the Velez don't have mesh). They're extremely comfortable to wear, but I've not yet got them properly soaked so jury is out. I've also not used them on a properly warm day. On such days I don't mind getting my Montane Terra trousers wet as they dry so quickly, but I'm also not doing multi day hikes where you might be somewhat more reluctant to get wet if you have no opportunity to dry off. I'm looking forward to using the Velez in hotter weather just to see what it's like, and to also get them properly wet.
For jackets, I've accepted I'll get wet/damp. If the jacket really does keep the rain out, then I sweat so get damp. If the jacket doesn't keep the rain out, then I get damp from that. There is no magic solution, but in hotter weather where you're not completely open to the wind, I've started using a trekking umbrella attached to my pack strap that provides both sun and rain protection. It's a game changer. But useless/dangerous in wind!
I'm keeping an eye out for a Paramo Velez Evolution Smock because of the huge amount of ventilation possibilities you get with all the zips, but again being that Directional material, it'll run warm.
The only real actionable advice I can offer is to buy and try. It's such a personal thing whether you run hot, or you mind the noise that some synthetic clothing makes, or you sweat a bunch etc.
If I could only take one system with me right now, it would be my extremely thin and ultralight Berghaus Hyper 100 jacket which is brilliantly thin, light, breathable, wind and rain proof (no pockets though so you need gloves), and then warm wool layers, including base layers to wick the inevitable sweat. Then for my trousers it would be again a very thin wool base layer for wicking, with Montane Terra trousers and then the Rab Downpour over trousers. I'd feel very comfortable and confident in that system in an awful lot of locations because you can switch all elements of it out depending on the exact conditions you're experiencing.