I don't know if it's a matter of "courage" but instead a matter of a limited bankroll. How many BI's deep are you on Ignition? At 10NL, there's a lot of bluffing by guys who have larger br's. This is common online in general, today. You either need to tighten up your ranges overall or loosen up and accept more variance/have to make wider calls. With those sizings you used, you're going to get floated a lot and then when you check OOP on river, you give villain the chance to put you in a terrible spot with a capped range.

In this spot, I think villain is way too value heavy to be calling this. You want to plan hands out when the flop comes down. Use a sizing that either prices villain out of potential draws, or keep the pot smaller and understand how the next card effects his range. You don't want to just double barrel 66% pot (for example) and then figure out where you're at when you get x/r'd on the turn. You need to be actively removing combos from V's range along each round of betting. With players like this who call down liberally and like to float, you're going to have to bet more than 50-60% pot. You would ideally like to create a situation (on this flop) where you get stacks in MW, or create an SPR on the turn that allows you to just shove on any card. As said, once you use smaller sizings, you're capping your range and on wet boards, you're going to get into a lot of tough spots like this.

Some thoughts:
1) In a multiway pot how frequently are you c-betting this flop? Specifically what combos are you leading with here? When you know how you are splitting your range on this texture you will have a better idea of where in your range you stand on dynamic turn and rivers.
2) In the game type above I like your line with specific hand against this particular opponent. You can probably even size a little larger on flop as MP2 stats seem to indicate an opponent who is inelastic to sizing and if he comes along can help bring in worse hands behind him.
3) Even though it is a very small sample, a player with a VPIP of 57.7% and high aggression percentage indicates a wider than normal range here and thus we can probably widen our calling range assuming this isn't the top of your range in this spot - see 1) above to find out if you have JTs, Ad8d, 56s, 78dd, etc. Depending on how many of these hands you have here you can find how many combos you need to be defending here and where 88 with 8d stands. Personally, unless this player has a high FCB percentage indicating a tighter continuing range than his VPIP indicates, I would be calling here. Having the 8 of diamonds helps (block top pair with BDFDs) and player can definitely be going crazy with 6x and a pair (and one diamond).

Hope this helps!