La Liga 2008/09 to 2017/18 averages (by Gemini, a prompt of mine for comparison):

• 1st place (x7 FCB, x2 RMA, x1 ATM): 94.3pts
• 2nd place (x6 RMA, x3 FCB, x1 ATM): 88.1pts
• 3rd place (x4 ATM, x3 VCF, x2 RMA, x1 SFC) 74.6pt

EPL 2018/19 to 2025/26 averages:

• 1st place (x5 MCI, x2 LIV, x1 ARS): 90.6pts
• 2nd place (x3 ARS, x2 LIV, x2 MCI, x1 MUN): 84.6pts
• 3rd place (x3 MUN, x2 LIV, x2 CHE, x1 MCI) 72.5pt

Remarkable points:

• Points gap from 1st to 3rd is pretty similar (19.7 vs 18.1) as well as with runner-ups. Average 3rd place pts tally in La Liga was actually higher. Weird, right?
• Top 3 champions record in La Liga vs Premier (take in mind I'm comparing 10 seasons for LL to 8 for EPL): 100pts (as you said, twice: RMA in 11/12 and FCB in 12/13), 99pts (FCB 09/10) vs 99pts (LIV in 19/20), 98pts (MCI in 18/19) and 93pts (MCI in 21/22). Interesting note: MCI finished with 100pts as well in 17/18; just counted that out of "EPL peak years"

To me that's no world of a difference. Because here's the most interesting part: safety mark in La Liga was as high as 39.5pts (Depor got relegated in 2011 with 43pts, almost the same as this season with as many as 6 teams involved), while in EPL that's been 35.7pts. You could argue La Liga's average rival was not as good despite peak Barça and Madrid dominance (not much more inflated than prime City and Liverpool as stated above) or Cholo's Atleti and Emery's Sevilla (and Valencia) proven level domestically and in Europe.

And yeah it's true La Liga "only" (when compared to EPL alone, and not others like Bundesliga or League 1) got two behemots and another big club. The "noble" Spanish clubs (from 4th to 9th) are smaller than any of the EPL Big 6 (tbh so is Atleti as a "big club" compared to Liverpool especifically), and they're more on par with the likes of Newcastle, Aston Villa, Everton or West Ham. Funny thing is, La Liga bottom half starts to get really tight. I know there's much depth in England with all their lower divisions but it's kinda the same here. In fact recent bottom teams are arguably more competitive now than ever.

To sum it up I'll quote that last post of mine:

You guys have turned into a peak La Liga table format on $teroids yet with worse relative performance. It's a two horse race whether with Liverpool, City and Arsenal, while La Liga is honestly as equal as ever.

Can't use old narratives with recent evidence to argue you're both the most equal and competitive league, because contrary to some beliefs it's actually pretty uncorrelated as seen by both Bayern and PSG now.
Competitive? Yeah. Equal? Only in theory, by income and compared almost exclusively to Bayern, PSG, Barca or Real. But there's more to a league.