Not currently watching because it's a film but I went to go see Insidious 3 with my girlfriend a few days ago, was a last minute decision. We both sort of knew what it was going to be since I'd seen the first film and hated it.
The first film was horrendously bad, it had one slightly scary moment and it was a jumpscare of Darth Mauls face popping up behind someone, the rest of it was "Ooooh look spooky things woooh are you spooked yet? How about after this sudden sound effect we've been building up for five minutes? Yeah you're pretty spooked aren't you? No? Oh... HOW ABOUT NOW?"
So going in to see the third one I was expecting something similar, it was at least better I'll admit, girlfriend got scared at one or two points and she's usually not bothered by jumpscares, but 90% of it was jumpscares, at least they had tense moments before them though for the most part and bits of it felt genuinely creepy. The only thing that fucking annoyed me is that because it was a sequel to the first one they were like "haha, you know what would be funny, have Darth Maul's face be a jumpscare right at the end again, just like the only scary moment in the first film, so we can remind everyone how awful it was"
Insidious: 2/10 Absolutely no fucking effort made
Insidious 3: 6/10 At least they made an effort this time, but it was 90% jumpscares and I'm sorry but they suck, if you rely on them then you just need to stop.